Plugin Error - Not Sure Where to Go From Here

Question

A while ago I was updating plugins for the site I work on, and the website encountered a critical error. Since then, the site and wp-admin has been non-functional. A visit comes up with this error message:

I managed to SSH into the website and rename the plugins folder to something else, hoping that this would allow the site to at least operate on a basic level, but that resulted in this 404 error:

Failing this, I tried to disable each plugin one by one by putting a "w" in front of each plugin's name. Again, each time I was met by the first "critical error" screen. I know that I first encountered this error when trying to update plugins, so I imagine this is still the culprit. Are there other steps I can take to disable these plugins? If the site encounters a critical error, is it possible that the wp-admin site may still be available? Could the culprit be something other than plugins? I'm not sure what to do, since I don't have access to the dashboard even when every plugin has been disabled.

Edit: I added a piece of the Error Log from the day things went down which may have some additional information, though I have some trouble understanding it. I found it in the "logs" folder.

[Mon Mar 18 00:52:05.040880 2024] [fcgid:warn] [pid 18265:tid 139819654731520] [client 114.119.129.50:39412] mod_fcgid: stderr: PHP Warning: The magic method Vc_Manager::__wakeup() must have public visibility in /var/www/vhosts/(website)/httpdocs/wp-content/plugins/js_composer/include/classes/core/class-vc-manager.php on line 203 [Mon Mar 18 00:52:05.040938 2024] [fcgid:warn] [pid 18265:tid 139819654731520] [client 114.119.129.50:39412] mod_fcgid: stderr: PHP Warning: The magic method WC_Software_License_Client::__wakeup() must have public visibility in /var/www/vhosts/(website)/httpdocs/wp-content/plugins/wc-vendors-pro/includes/lib/class-wc-software-license-client.php on line 152 [Mon Mar 18 00:52:05.040942 2024] [fcgid:warn] [pid 18265:tid 139819654731520] [client 114.119.129.50:39412] mod_fcgid: stderr: PHP Fatal error: Unparenthesized a ? b : c ? d : e is not supported. Use either (a ? b : c) ? d : e or a ? b : (c ? d : e) in /var/www/vhosts/(website)/httpdocs/wp-content/plugins/wc-vendors-pro/public/class-wcvendors-pro-form-helper.php on line 1135

I also tried to enable WP_Debug(), but the wp_config file has no text matches for "debug," so I'm not sure what to change to ensure errors are properly logged.