sandrayin

Found the solution. It is due to my virtual machine timezone is not the same as my local computer time. So I added in date_default_timezone_set('Asia/Kuala_Lumpur'); in auto-prune-posts.php

foreach ($myposts AS $post) {
	date_default_timezone_set('Asia/Kuala_Lumpur');
	$post_date_plus_visibleperiod = strtotime($post->post_date . " +" . $period_php);
	$now = strtotime("now");

Update, I have disabled all plugins except Woocommerce and Yikes custom tabs. But the error still persisted.

I am currently at WC 3.3.4.
Custom tab (free version)

At the Woocommerce status page, this is what I got:

Active plugins (2)
WooCommerce – by Automattic – 3.3.4
Custom Product Tabs for WooCommerce – by YIKES, Inc. – 1.6.4 – Not tested with the active version of WooCommerce

Hi,

1. Do you have any errors with adding custom tabs or is the error only for saved tabs?
– I just tried, clicking the ‘add a tab’ or ‘add a saved tab’ will give me that error. Looks like it is not due to save tabs only.

2. Also, when you say “Adding saved tabs,” you’re referring to adding them to a product, right?
– Yes adding to a product. No problem in saving a global tab.

3. List of plugins. Some are not able to update because subscription expired.
–

AfterShip - WooCommerce Tracking	Version 1.8.1 | By?AfterShip?|?View details
Billplz for WooCommerce	Version 3.18 | By?Wanzul Hosting Enterprise?|?View details
Code Snippets	Version 2.10.1.1 | By?Shea Bunge?|?View details?|?About?|?Support?|?Donate
Columns	Version 0.7.3 | By?Konstantin Kovshenin?|?View details
Contact Form 7	Version 5.0.1 | By?Takayuki Miyoshi?|?View details
Contact Form DB	Version 2.10.29 | By Michael Simpson |?Visit plugin site
Cool Timeline	Version 1.3.2 | By?Cool Timeline Team?|?View details
Cornerstone	Version 3.0.4 | By?Themeco?|?Visit plugin site
Custom Product Tabs for WooCommerce	Version 1.6.4 | By?YIKES, Inc.?|?View details
Duplicate Page	Version 2.5 | By?mndpsingh287?|?View details
Essential Grid	Version 2.2.4 | By?ThemePunch?|?Visit plugin site
Facebook for WooCommerce	Version 1.8.2 | By?Facebook?|?Visit plugin site
Force Regenerate Thumbnails	Version 2.0.6 | By?Pedro Elsner?|?View details
Google Analytics Dashboard for WP (GADWP)	Version 5.3.1.1 | By?Alin Marcu?|?View details
Product Brands For WooCommerce	Version 1.0 | By?Varun Sridharan?|?View details
Really Simple SSL	Version 2.5.26 | By?Rogier Lankhorst?|?View details
Redirection	Version 3.2 | By?John Godley?|?View details
Simply Show Hooks	Version 1.2.1 | By?Stuart O'Brien, cxThemes?|?View details
Slider Revolution	Version 5.4.7.2 | By?ThemePunch?|?Visit plugin site
Smart Manager	Version 3.16.1 | By?StoreApps?|?View details
UberMenu 3 - The Ultimate WordPress Mega Menu	Version 3.2.7 | By?Chris Mavricos, SevenSpark?|?Visit plugin site?|?Check for updates
WooCommerce	Version 3.3.4 | By?Automattic?|?View details?|?Docs?|?API docs?|?Premium support
WooCommerce Advanced Shipping	Version 1.0.13 | By?Jeroen Sormani?|?Visit plugin site
WooCommerce Cart Stock Reducer	Version 2.10 | By James Golovich |?View details
WooCommerce Checkout Field Editor Pro	Version 2.7.7 | By?ThemeHiGH?|?Visit plugin site
WooCommerce Gateways Country Limiter	Version 1.4 | By?OnTheGoSystems?|?Visit plugin site
WooCommerce Menu Extension	Version 1.6 | By?August Infotech?|?View details
WooCommerce Multilingual	Version 4.2.9 | By?OnTheGoSystems?|?View details
WooCommerce PDF Invoices & Packing Slips	Version 2.1.6 | By?Ewout Fernhout?|?View details?|?Documentation?|?Support Forum
WooCommerce TM Extra Product Options	Version 4.6.5 | By?themecomplete?|?Visit plugin site
WP Facebook Messenger	Version 1.0 | By?Ninja Team?|?View details
WP Rich Snippets	Version 1.4.6 | By?Hesham Zebida?|?View details
WP Rocket	Version 2.11.7 | By?WP Media?|?Visit plugin site
WP Rocket | Disable Page Caching	By?WP Rocket Support Team?|?Visit plugin site
WPFront Notification Bar	Version 1.7 | By?Syam Mohan?|?View details
WPML CMS Nav	Version 1.4.21 | By?OnTheGoSystems?|?View details
WPML Media	Version 2.2.1 | By?OnTheGoSystems?|?View details
WPML Multilingual CMS	Version 3.8.0 | By?OnTheGoSystems?|?View details
WPML Sticky Links	Version 1.4.2 | By?OnTheGoSystems?|?View details
WPML String Translation	Version 2.6.0 | By?OnTheGoSystems?|?View details
WPML Translation Management	Version 2.4.0 | By?OnTheGoSystems?|?View details
WPRS Customizer	Version 1.5 | By?Hesham Zebida?|?Visit plugin site
WPRS WooCommerce Reviews	Version 1.0 | By?Hesham Zebida?|?View details
X – Email Forms (MailChimp)	Version 1.1.2 | By?Themeco?|?Visit plugin site
X – Smooth Scroll	Version 1.0.4 | By?Themeco?|?Visit plugin site
Yoast SEO	Version 7.1 | By?Team Yoast?|?View details

Hi, I only have WPML.

I want to know too!!

I am also getting this issue. disabled WCML, then resolved. This undefined issue will cause /undefined url once a while. Its a pain.

WCML Version 4.1.4.