There is a critical error on your website

[Admin]

You need to edit the existing line with WP_DEBUG, not add a new one.

Also, enabling display_errors can help too. You can enable it through the Alter PHP Config option in the control panel.

I just did, and I saw two version compatibility errors from WordPress, and a PHP error saying your WooCommerce plugin was corrupted.

To fix the corrupted WordPress plugin, please see this article:

Installation failed: There has been a critical error on your website

WordPress supports installing and updating plugins and themes from the official store right through the WordPress admin interface. However, after trying to install or update a large plugin (like WooCommerce) or theme, you may encounter an error like this: Installation failed: There has been a critical error on your website. Please check your site admin email inbox for instructions. Learn more about debugging in WordPress. This error means that the installation process crashed, and may have l…

To fix the corrupted WordPress installation itself, please do this:

How to fix a corrupted WordPress installation

WordPress frequently releases updates, which you can install through WordPress’ admin interface. Usually, this works without a hitch. But with some (big) upgrades, the upgrade fails half way and leaves you with a broken website. Fortunately, you can still fix your website without any data loss, and this article tells you how to do that. Download a fresh copy of WordPress First of all, you will need to download a fresh copy of WordPress. You can download this from the official WordPress website…