Hello, apologies MaxSlider has caused such issues on your website.
I’m here to help; it looks like your WP version doesn’t support the new WP Block Editor yet so we’ll have to disable MaxSlider manually.
Solution 1: You’ll need FTP access for this (preferred):
Log into your website’s FTP and navigate to the plugins folder (/root/wp-content/plugins). You will see “maxslider” listed there, simply rename that folder to something else (i.e. “maxslider_old” or “.maxslider” — adding a dot in front will make it a hidden folder). Then refresh your website, it should be running.
Solution 2: Database Access
If you don’t have FTP access but you do have PHPMyAdmin access (i.e. an interface to access and edit your database) you can find the “wp_options” table in your website’s database and then the “active_plugins” column. You will need to edit that column and find among the string there the maxslider.php entry. Right before it you will see an “a:1” string, change it to “a:0” and it will be disabled.
For more info on that last step check here (with screenshots): https://www.ostraining.com/blog/wordpress/disable-a-wordpress-plugin/
Lastly, for the cPanel access I’m really dumbfounded that this error would cause your cpanel server to not respond, this shouldn’t be the case as WP is generally sandboxed from cpanel.
One extra step to re-enable MaxSlider is to then upload the previous version (1.8.0 should do) from your dashboard (or of course FTP). You can find all past MaxSlider versions here https://www.ads-software.com/plugins/maxslider/advanced/ if you scroll at the very bottom (you will see a dropdown with all the versions, select 1.8.0 and then the “Download” button).
If you don’t have access to either FTP or the database please shoot back to check for other solutions. Apologies for your trouble here!