One of the first things you should do when you see WordPress Critical Error is to check your WordPress and the plugins you are using. To access your error logs, you'll need to log in to your hosting account and go to File Manager or use FTP client to access your website's files. By increasing the memory limit for your website, you may be able to resolve the problem. Another thing you can do to try and fix WordPress Critical Error is to check your database as it's possible problem with your database could be causing the error.. you may want to consider creating WordPress staging site. To create WordPress staging site, you'll need to log in to your hosting account and follow the steps provided by your hosting provider. you may be able to resolve the problem by resetting your theme. To enable WordPress Debugging feature, you'll need to add the following line of code to your wp-config php file define. To use WordPress Health Check plugin, you'll need to install it on your website and then go to the Tools > Site Health page in your WordPress dashboard. You can also try to remove the malicious code you may need to remove the malicious code.
Read more