Plugin no longer working

Hi:

I’ve been using your WC add-on plugin and the Key server server-side plugin (on separate machines) for some time and they have both been working great until now.

After just updating to WP v4.8 on both servers, I now have lost communication between the 2.
My Key server URL has not changed, nor has my SECRET KEY.
Beyond the WP update, I’ve made no other configuration changes on my WC server, or on the Key server.

Here is my WC System Report for my test store:

### WordPress Environment ###

Home URL: removed
Site URL: removed
WC Version: 3.0.9
Log Directory Writable: ?
WP Version: 4.8
WP Multisite: –
WP Memory Limit: 256 MB
WP Debug Mode: –
WP Cron: ?
Language: en_CA

### Server Environment ###

Server Info: Apache/2.4.10 (Ubuntu)
PHP Version: 5.6.4-4ubuntu6.4
PHP Post Max Size: 8 MB
PHP Time Limit: 30
PHP Max Input Vars: 1000
cURL Version: 7.38.0
OpenSSL/1.0.1f

SUHOSIN Installed: –
MySQL Version: 5.6.28
Max Upload Size: 8 MB
Default Timezone is UTC: ?
fsockopen/cURL: ?
SoapClient: ?
DOMDocument: ?
GZip: ?
Multibyte String: ?
Remote Post: ?
Remote Get: ?

### Database ###

WC Database Version: 3.0.9
WC Database Prefix: wp_
woocommerce_sessions: ?
woocommerce_api_keys: ?
woocommerce_attribute_taxonomies: ?
woocommerce_downloadable_product_permissions: ?
woocommerce_order_items: ?
woocommerce_order_itemmeta: ?
woocommerce_tax_rates: ?
woocommerce_tax_rate_locations: ?
woocommerce_shipping_zones: ?
woocommerce_shipping_zone_locations: ?
woocommerce_shipping_zone_methods: ?
woocommerce_payment_tokens: ?
woocommerce_payment_tokenmeta: ?
MaxMind GeoIP Database: ?

### Security ###

Secure connection (HTTPS): ?Your store is not using HTTPS. Learn more about HTTPS and SSL Certificates.
Hide errors from visitors: ?

### Active Plugins (4) ###

SSH SFTP Updater Support: by TerraFrost – 0.7.1
WC Software License Manager: by Omid Shamlu – 1.0.7
WooCommerce - Autocomplete Orders: by Serious Plugins – 1.1.4
WooCommerce: by Automattic – 3.0.9

### Settings ###

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

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)

### WC Pages ###

Shop base: #4 - /
Cart: #5 - /cart/
Checkout: #6 - /checkout/
My account: #7 - /my-account/

### Theme ###

Name: Twenty Seventeen
Version: 1.3
Author URL: https://www.ads-software.com/
Child Theme: ? – If you're modifying WooCommerce on a parent theme you didn't build personally
then we recommend using a child theme. See: How to create a child theme

WooCommerce Support: ?

### Templates ###

Overrides: twentyseventeen/woocommerce/emails/customer-invoice.php

Here is a system report for my key server:

Server
This shows a high level breakdown of what your server looks like.
Software: Apache/2.4.7 (Ubuntu)
Name: removed
Address: removed
Port: 80
PHP
PHP Configuration and INI settings.
Version: 5.5.9-1ubuntu4.20
Display Errors: false
POST Max Size: 200M
Error Log:
Max Execution Time: 30
Memory Limit: 256M
WordPress
Report of your WordPress installation.
Version: 4.8
Admin Email: removed
Language: en-US
Stylesheet Dir: https://removed/wp-content/themes/twentyseventeen
Template Dir: https://removed/wp-content/themes/twentyseventeen
Charset: UTF-8
URL: removed
WP URL: removed
Theme
Information on the current active theme.
Name: Twenty Seventeen
Author: the WordPress team
Author URI: https://www.ads-software.com/
Version: 1.3
Theme Root: /var/www/wp-content/themes
Template:
Plugins
Report of your WordPress installation.
Restricted Site Access Active 6.0.1
Software License Manager Active 2.9
SSH SFTP Updater Support Active 0.7.1
System Report Active 1.0.2
WP File Manager Active 1.6

Database
This shows some basic information about your database.
Version: 5.6.33
Base Prefix: wp_
Table Count: 14
Row Count: 0.20k
Option Count: 162
Post Count: 3

Thanks for your attention in this matter.

Best Regards,