WooCommerce gives 502 error on checkout, if i have more than 20 products in cart

Hey there!

Could you please share a copy of your site’s System Status? You can find it via WooCommerce > Status.
Select “Get system report” and then “Copy for support”.? Once you’ve done that, paste it here in your response.

Hello @fevered
Here you go

### WordPress Environment ###

WordPress address (URL): https://canv.kintivoetrains.wpengine.com
Site address (URL): https://canv.kintivoetrains.wpengine.com
WC Version: 4.0.1
REST API Version: ? 1.0.7
WC Blocks Version: ? 2.5.14
Action Scheduler Version: ? 3.1.4
WC Admin Version: ? 1.0.3
Log Directory Writable: ?
WP Version: ? 5.4 - There is a newer version of WordPress available (5.4.1)
WP Multisite: ?
WP Memory Limit: 512 MB
WP Debug Mode: –
WP Cron: ?
Language: en_US
External object cache: –

### Server Environment ###

Server Info: Apache
PHP Version: 7.3.16-1+ubuntu18.04.1+deb.sury.org+1
PHP Post Max Size: 100 MB
PHP Time Limit: 3600
PHP Max Input Vars: 5000
cURL Version: 7.58.0
OpenSSL/1.1.1d

SUHOSIN Installed: –
MySQL Version: 5.7.29-32-log
Max Upload Size: 1 MB
Default Timezone is UTC: ?
fsockopen/cURL: ?
SoapClient: ?
DOMDocument: ?
GZip: ?
Multibyte String: ?
Remote Post: ?
Remote Get: ?

### Database ###

WC Database Version: 4.0.1
WC Database Prefix: wp_9_
Total Database Size: 372.10MB
Database Data Size: 186.50MB
Database Index Size: 185.60MB
wp_9_woocommerce_sessions: Data: 0.22MB + Index: 0.02MB + Engine InnoDB
wp_9_woocommerce_api_keys: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_woocommerce_attribute_taxonomies: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_woocommerce_downloadable_product_permissions: Data: 1.52MB + Index: 2.42MB + Engine InnoDB
wp_9_woocommerce_order_items: Data: 4.52MB + Index: 1.52MB + Engine InnoDB
wp_9_woocommerce_order_itemmeta: Data: 18.55MB + Index: 18.06MB + Engine InnoDB
wp_9_woocommerce_tax_rates: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_9_woocommerce_tax_rate_locations: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_woocommerce_shipping_zones: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_woocommerce_shipping_zone_locations: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_woocommerce_shipping_zone_methods: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_woocommerce_payment_tokens: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_woocommerce_payment_tokenmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_woocommerce_log: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_actionscheduler_actions: Data: 0.33MB + Index: 0.16MB + Engine InnoDB
wp_9_actionscheduler_claims: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_actionscheduler_groups: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_actionscheduler_logs: Data: 0.14MB + Index: 0.13MB + Engine InnoDB
wp_9_aws_cache: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_aws_index: Data: 10.52MB + Index: 5.97MB + Engine InnoDB
wp_9_commentmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_comments: Data: 0.02MB + Index: 0.09MB + Engine InnoDB
wp_9_em_bookings: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_9_em_events: Data: 0.02MB + Index: 0.27MB + Engine InnoDB
wp_9_em_locations: Data: 0.02MB + Index: 0.08MB + Engine InnoDB
wp_9_em_meta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_em_tickets: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_em_tickets_bookings: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_gf_draft_submissions: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_gf_entry: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_gf_entry_meta: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_9_gf_entry_notes: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_gf_form: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_gf_form_meta: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_gf_form_revisions: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_gf_form_view: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_import_detail_log: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_links: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_nextend2_image_storage: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_nextend2_section_storage: Data: 0.05MB + Index: 0.03MB + Engine InnoDB
wp_9_nextend2_smartslider3_generators: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_nextend2_smartslider3_sliders: Data: 0.03MB + Index: 0.00MB + Engine InnoDB
wp_9_nextend2_smartslider3_sliders_xref: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_nextend2_smartslider3_slides: Data: 0.05MB + Index: 0.00MB + Engine InnoDB
wp_9_options: Data: 3.14MB + Index: 0.14MB + Engine InnoDB
wp_9_pmxi_files: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_pmxi_history: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_pmxi_imports: Data: 0.30MB + Index: 0.00MB + Engine InnoDB
wp_9_pmxi_posts: Data: 0.11MB + Index: 0.00MB + Engine InnoDB
wp_9_pmxi_templates: Data: 0.36MB + Index: 0.00MB + Engine InnoDB
wp_9_postmeta: Data: 116.66MB + Index: 131.39MB + Engine InnoDB
wp_9_posts: Data: 13.52MB + Index: 10.06MB + Engine InnoDB
wp_9_revisr: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_smackcsv_file_events: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_snippets: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_termmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_terms: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_term_relationships: Data: 0.13MB + Index: 0.13MB + Engine InnoDB
wp_9_term_taxonomy: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_ultimate_csv_importer_acf_fields: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_ultimate_csv_importer_external_file_schedules: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_ultimate_csv_importer_ftp_schedules: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_ultimate_csv_importer_log_values: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_ultimate_csv_importer_manageshortcodes: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_ultimate_csv_importer_mappingtemplate: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_ultimate_csv_importer_media: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_ultimate_csv_importer_scheduled_export: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_ultimate_csv_importer_scheduled_import: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_ultimate_csv_importer_shortcodes_statusrel: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_ultimate_csv_importer_shortcode_manager: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_user_registration_sessions: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_wcs_payment_retries: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_wc_admin_notes: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_wc_admin_note_actions: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_wc_category_lookup: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_wc_customer_lookup: Data: 1.52MB + Index: 0.66MB + Engine InnoDB
wp_9_wc_download_log: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_wc_order_coupon_lookup: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_wc_order_product_lookup: Data: 1.52MB + Index: 0.52MB + Engine InnoDB
wp_9_wc_order_stats: Data: 4.52MB + Index: 5.55MB + Engine InnoDB
wp_9_wc_order_tax_lookup: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_wc_product_meta_lookup: Data: 0.09MB + Index: 0.16MB + Engine InnoDB
wp_9_wc_tax_rate_classes: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_wc_webhooks: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_woobe_history: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_9_woobe_history_bulk: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_woocommerce_bundled_itemmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_woocommerce_bundled_items: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_woof_query_cache: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_wpfm_backup: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_wswebinars_chats: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_9_wswebinars_notifications: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_9_wswebinars_questions: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_9_wswebinars_subscribers: Data: 0.05MB + Index: 0.08MB + Engine InnoDB
wp_blogmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_blogs: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_ms_snippets: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_registration_log: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_signups: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_site: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_sitemeta: Data: 1.05MB + Index: 0.03MB + Engine InnoDB
wp_usermeta: Data: 4.52MB + Index: 6.03MB + Engine InnoDB
wp_users: Data: 1.52MB + Index: 0.78MB + Engine InnoDB

### Post Type Counts ###

acf-field: 19
acf-field-group: 5
attachment: 82
custom_css: 1
customize_changeset: 8
elementor_library: 4
event: 3
location: 3
nav_menu_item: 14
page: 48
post: 3
product: 415
product_variation: 320
revision: 99
shop_coupon: 2
shop_order: 37396
shop_order_refund: 2
user_registration: 1
wc_membership_plan: 3
wc_memberships_team: 321
wc_user_membership: 4
wpforms: 1
wpt_product_table: 13
wpws_page: 2
wswebinars: 416

### Security ###

Secure connection (HTTPS): ?
Hide errors from visitors: ?

### Active Plugins (62) ###

Advanced Custom Fields: by Elliot Condon – 5.8.9
Advanced Woo Search: by ILLID – 1.97
Atomic Blocks - Gutenberg Blocks Collection: by atomicblocks – 2.7.1
Elementor: by Elementor.com – 2.9.7
Genesis eNews Extended: by Brandon Kraft – 2.1.1
Jetpack by WordPress.com: by Automattic – 8.3
Kintivo Import Data Customization: by Kintivo Developer – 1.0.0
Kintivo Product Variations Importer: by Kintivo Developer – 0.1
WooCommerce Order Export and More: by JEM Plugins – 2.0.13 – Not tested with the active version of WooCommerce
Smart Slider 3: by Nextend – 3.3.28
Widget Importer & Exporter: by ChurchThemes.com – 1.5.5
Woo Product Table: by CodeAstrology – 2.6.1 – Not tested with the active version of WooCommerce
WooCommerce Admin: by WooCommerce – 1.0.3
WooCommerce PayPal Checkout Gateway: by WooCommerce – 1.6.20 – 1.6.21 is available – Not tested with the active version of WooCommerce
WooCommerce Stripe Gateway: by WooCommerce – 4.3.2 – Not tested with the active version of WooCommerce
WooCommerce PayPal Pro: by wp.insider – 2.9.1 – Not tested with the active version of WooCommerce
WooCommerce Services: by Automattic – 1.22.5 – 1.23.0 is available
Store Toolkit for WooCommerce: by Visser Labs – 2.2 – Not tested with the active version of WooCommerce
WP All Import Pro: by Soflyy – 4.5.0
WooCommerce: by Automattic – 4.0.1
Genesis Connect for WooCommerce: by StudioPress – 1.1.0 – Not tested with the active version of WooCommerce
Genesis Simple Edits: by StudioPress – 2.3.0
WooCommerce Product Bundles: by SomewhereWarm – 5.10.2 – Not tested with the active version of WooCommerce
WooCommerce Composite Products: by SomewhereWarm – 4.0.6 – Not tested with the active version of WooCommerce
WooCommerce Subscriptions: by Prospress Inc. – 2.5.6 – Not tested with the active version of WooCommerce
WooCommerce Memberships: by SkyVerge – 1.13.1 – Not tested with the active version of WooCommerce
Teams for WooCommerce Memberships: by SkyVerge – 1.1.4 – Not tested with the active version of WooCommerce
WordPress Users & WooCommerce Customers Import Export(BASIC): by WebToffee – 1.4.1
Disable Real MIME Check: by Sergey Biryukov – 1.0
WebinarPress Pro: by WebinarPress – 2.19.2
WooCommerce Admin: by WooCommerce – 1.0.3
Gravity Forms: by rocketgenius – 2.4.17
Widget Importer & Exporter: by ChurchThemes.com – 1.5.5
Elementor: by Elementor.com – 2.9.7
Smart Slider 3: by Nextend – 3.3.28
Woo Product Table: by CodeAstrology – 2.6.1 – Not tested with the active version of WooCommerce
NS Cloner - Site Copier: by Never Settle – 4.0.7
UpdraftPlus - Backup/Restore: by UpdraftPlus.Com
DavidAnderson – 1.16.23

WP File Manager: by mndpsingh287 – 5.8
WP Crontrol: by John Blackbourn & crontributors – 1.7.1
LoginPress - Customizing the WordPress Login: by WPBrigade – 1.4.3
Advanced Order Export For WooCommerce: by AlgolPlus – 3.1.3
WOO Product Table Pro: by CodeAstrology – 5.7.7 – Not tested with the active version of WooCommerce
Code Snippets: by Code Snippets Pro – 2.14.0
WooCommerce Menu Cart: by Jeremiah Prummer
Ewout Fernhout – 2.7.8.1

WooCommerce Min Max Quantity & Step Control Global: by Saiful Islam – 1.5 – Not tested with the active version of WooCommerce
Network Subsite User Registration: by Justin Fletcher – 2.8
WooCommerce Bulk Editor: by realmag777 – 1.0.5.1 – Not tested with the active version of WooCommerce
WOOF - WooCommerce Products Filter: by realmag777 – 1.2.3 – Not tested with the active version of WooCommerce
Members: by MemberPress – 2.2.0
WP FullCalendar: by Marcus Sykes – 1.2
WP phpMyAdmin: by Puvox.software – 3.02
Events Manager: by Marcus Sykes – 5.9.7.3
SSL Insecure Content Fixer: by WebAware – 2.7.2
Kintivo Helper: by Kintivo – 1.0
WP Migrate DB: by Delicious Brains – 1.0.13
WooCommerce Checkout Field Editor: by WooCommerce – 1.5.21 – Not tested with the active version of WooCommerce
WooCommerce Multisite Content Copier/Updater: by Obtain Infotech – 1.2.0 – Not tested with the active version of WooCommerce
WordPress Multisite Posts, Pages and Custom Post Type Posts Sync: by Obtain Infotech – 1.4.0
WP All Import - WooCommerce Add-On: by Soflyy – 1.4.4
WP All Import Pro: by Soflyy – 4.5.0
WP Mail SMTP: by WPForms – 2.0.0

### Inactive Plugins (10) ###

Akismet Anti-Spam: by Automattic – 4.1.4
Manage Notification E-mails: by Virgial Berveling – 1.5.0
Order / Coupon / Subscription Export Import Plugin for WooCommerce (BASIC): by WebToffee – 1.6.3
Product CSV Import Export (BASIC): by WebToffee – 1.7.7
Ultimate Member: by Ultimate Member – 2.1.5
User Registration: by WPEverest – 1.8.2.1
WordPress Multisite Content Copier/Updater: by Obtain Infotech – 1.4.0
WPForms Lite: by WPForms – 1.5.9.5
WP Ultimate CSV Importer: by Smackcoders – 6.1.2
WP Ultimate CSV Importer Pro: by Smackcoders – 6.0.1

### Dropin Plugins (1) ###

advanced-cache.php: advanced-cache.php

### Must Use Plugins (6) ###

Force Strong Passwords - WPE Edition: by Jason Cosper – 1.6.4
WP Engine Seamless Login Plugin: by WP Engine – 1.5.3
WP Engine Security Auditor: by wpengine – 1.0.8
WP Engine System: by WP Engine – 4.0.0
WP Migrate DB Compatibility: by Delicious Brains – 1.2
x_disable_wpesec.php: by  –

### Settings ###

API Enabled: –
Force SSL: ?
Currency: USD ($)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 2
Taxonomies: Product Types: bundle (bundle)
composite (composite)
external (external)
grouped (grouped)
simple (simple)
subscription (subscription)
variable (variable)
variable subscription (variable-subscription)
webinar (webinar)

Taxonomies: Product Visibility: exclude-from-catalog (exclude-from-catalog)
exclude-from-search (exclude-from-search)
featured (featured)
outofstock (outofstock)
rated-1 (rated-1)
rated-2 (rated-2)
rated-3 (rated-3)
rated-4 (rated-4)
rated-5 (rated-5)

Connected to WooCommerce.com: –

### WC Pages ###

Shop base: #6 - /shop/
Cart: #7 - /cart/
Checkout: #8 - /checkout/
My account: #9 - /my-account/
Terms and conditions: ? Page not set

### Theme ###

Name: Authority Pro
Version: 1.2.0
Author URL: https://www.studiopress.com/
Child Theme: ?
Parent Theme Name: Genesis
Parent Theme Version: 3.3.1
Parent Theme Author URL: https://www.studiopress.com/
WooCommerce Support: ?

### Templates ###

Overrides: authority-pro/woocommerce/emails/admin-cancelled-order.php
authority-pro/woocommerce/emails/customer-completed-order.php version 3.5.0 is out of date. The core version is 3.7.0
authority-pro/woocommerce/emails/customer-invoice.php version 3.5.0 is out of date. The core version is 3.7.0
authority-pro/woocommerce/emails/customer-processing-order.php
authority-pro/woocommerce/emails/customer-reset-password.php version 3.7.0 is out of date. The core version is 4.0.0
authority-pro/woocommerce/emails/email-header.php version 2.4.0 is out of date. The core version is 4.0.0
authority-pro/woocommerce/order/order-downloads.php

Outdated Templates: ?
					
					
						Learn how to update

### Memberships ###

Restriction mode:: Hide content only
Public content:: Products: 1 item
Excluded from discounts:: 323 products
Membership plans:: 2
League-Member Non-PLP:: Members: 2Access method: Manual assignment onlyAccess length: Specific length (1 years)Subscription: No
2020-PLP:: Members: 2Access method: Product(s) purchaseAccess length: Fixed dates (365 days)Subscription: No

### Subscriptions ###

WCS_DEBUG: ? No
Subscriptions Mode: ? Staging
Subscriptions Live URL: https://canv.etrain-cu.com
Subscription Statuses: –
WooCommerce Account Connected: ? No
Custom Retry Rules: ? No
Custom Retry Rule Class: ? No
Custom Raw Retry Rule: ? No
Custom Retry Rule: ? No
Retries Migration Status: ? Completed
Report Cache Enabled: ? Yes
Cache Update Failures: ? 0 failure

### Store Setup ###

Country / State: United States (US) — California

### Payment Gateway Support ###

PayPal-Pro: products

### Templates ###

thumbnail: 
medium: 
medium_large: 
large: 
1536x1536: 
2048x2048: 
single-featured-image: 
blog-featured-image: 
home-featured: 
ab-block-post-grid-landscape: 
ab-block-post-grid-square: 
woocommerce_thumbnail: 
woocommerce_single: 
woocommerce_gallery_thumbnail: 
shop_catalog: 
shop_single: 
shop_thumbnail: 

### Composite Products ###

Database Version: 4.0.6
Template Overrides: –

### Product Bundles ###

Database Version: 5.10.2
Template Overrides: –

### Action Scheduler ###

Complete: 536
Oldest: 2020-03-30 16:07:05 +0000
Newest: 2020-04-30 16:02:23 +0000

Pending: 22
Oldest: 2020-04-30 17:02:23 +0000
Newest: 2020-12-31 00:00:00 +0000

Please check help me to get this issue fixed.

Thanks for that! Where I would start with troubleshooting this would be to test if there is either a conflict with your theme or with another plugin.
?
The best way to determine this is to:

• Temporarily switch your theme to Storefront
• Disable all plugins except for WooCommerce
• Repeat the action that is causing the problem

If you’re not seeing the same problem after completing the conflict test, then you know the problem was with the plugins and/or theme you deactivated. To figure out which plugin is causing the problem, reactivate your other plugins one by one, testing after each, until you find the one causing conflict. You can find a more detailed explanation on how to do a conflict test here.

We haven’t heard back from you in a while, so I’m going to mark this as resolved – if you have any further questions, you can start a new thread.