Critical error on your website After Updating WooCommerce

Getting same error with WP 5.5 and WooCommerce 4.4.0.

[18-Aug-2020 18:44:42 UTC] PHP Fatal error: Declaration of Automattic\WooCommerce\Internal\DependencyManagement\ExtendedContainer::get($id, bool $new = false) must be compatible with League\Container\Container::get($alias, array $args = Array) in /wp-content/plugins/woocommerce/src/Internal/DependencyManagement/ExtendedContainer.php on line 18

Also noticed this in download results:

The authenticity of woocommerce.4.4.0.zip could not be verified as no signature was found.

Same error here, what is going on? I had to totally deactivate woocommerce plugin

Stack trace:
wp-content/plugins/woocommerce/includes/class-wc-query.php(363): WC_Query->adjust_total_pages()
/wp-includes/class-wp-hook.php(289): WC_Query->handle_get_posts(Array)
#2 /wp-includes/plugin.php(249): WP_Hook->apply_filters(Array, Array)
#3 /wp-includes/class-wp-query.php(3190): apply_filters_ref_array(‘the_posts’, Array)
#4 /wp-includes/class-wp-query.php(3448): WP_Query->get_posts()
#5 //wp-includes/query.php(98): WP_Query->query(Array)
#6 /wp-content/plugins/notificationx/extensions/form/class-cf7.php(94): query_post in /home1/circlej4/public_html//plugins/woocommerce/includes/class-wc-query.php on line 376

Hello.

We confirm the problem with different themes. After update to the WooCommerce 4.4.0 the error:

Fatal error: Uncaught Error: Call to undefined function wc_get_loop_prop()
in \wp-content\plugins\woocommerce\includes\class-wc-query.php on line 376

Howdy!

If you use WP Rocket plugin, please update WP Rocket plugin to version 3.6.4.

If you are not using WP Rocket plugin, this kind of problem is usually caused by 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.

Alternatively, you can downgrade back to version 4.3.3 of WooCommerce and that will resolve the issue (as mentioned by @aimaatigari above). More info on that here: https://github.com/woocommerce/woocommerce/issues/27389

@humanitymedia and @josephcondon: If you both have the Order Status Manager plugin installed and activated on your site, I’d recommend contacting us at WooCommerce.com > My Account > Tickets through the account that purchased the extension.

SkyVerge will be able to help you further after opening a ticket. Please include a link to this forum thread, so that that SkyVerge can keep track of this conversation.

@humanitymedia thanks! I’m curious to see what caused this issue with that particular plugin. Hopefully you will get a response soon.

As an update, we should be releasing WooCommerce version 4.4.1 sometime today that should resolve these issues.

We highly recommend that you test any updates on a staging site first.

If you don’t currently have a staging site, the WP Staging plugin https://wordpress.org/plugins/wp-staging/ is perfect for making a clone of your live site so you can set up a staging site and test for issues without influencing your live site in any way.

If you need help setting it up, you can find the step by step documentation here: https://wordpress.org/plugins/wp-staging/#description under “HOW TO INSTALL AND SETUP?”

Here is a screencast showing the setup process after the install: https://cld.wthms.co/HC1pdz

Once the staging site is ready to go, you will see a blue Open staging site button like this: https://cld.wthms.co/77o0FX

Click on that and login to the staging site with the same credentials that you use to login to your main website.

Then, you can follow the information here to test for conflicts with your theme, plugins, and settings:

https://docs.woocommerce.com/document/woocommerce-self-service-guide/#section-4