We keep getting these automated wordpress emails about fatal errors - Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.
In this case, WordPress caught an error with one of your plugins, Toolset Types.
Error Details
=============
An error of type E_ERROR was caused in line 428 of the file /var/www/html/ma/mantelortho.com/wp-content/plugins/types/vendor/otgs/installer/includes/class-wp-installer.php. Error message: Uncaught Error: [] operator not supported for strings in /var/www/html/ma/mantelortho.com/wp-content/plugins/types/vendor/otgs/installer/includes/class-wp-installer.php:428
Stack trace:
#0 /var/www/html/ma/mantelortho.com/wp-includes/class-wp-hook.php(289): WP_Installer->plugins_action_links_registered()
#1 /var/www/html/ma/mantelortho.com/wp-includes/plugin.php(206): WP_Hook->apply_filters()
#2 /var/www/html/ma/mantelortho.com/wp-admin/includes/class-wp-plugins-list-table.php(826): apply_filters()
#3 /var/www/html/ma/mantelortho.com/wp-admin/includes/class-wp-plugins-list-table.php(605): WP_Plugins_List_Table->single_row()
#4 /var/www/html/ma/mantelortho.com/wp-admin/includes/class-wp-list-table.php(1273): WP_Plugins_List_Table->display_rows()
#5 /var/www/html/ma/mantelortho.com/wp-admin/includes/class-wp-list-table.php(1204): WP_List_Table->display_rows_or_placeholder()
#6 /var/www/html/ma/mantelortho.com/wp-admin/plugins.php(637): WP_List_Table->display()
#7 {main}
thrown
not that i know of. It's one of those automated emails that wordpress does now when an error occurs.
On the plugins list it says this at the top "There has been a critical error on your website. Please check your site admin email inbox for instructions."
And the full list of plugins does not display -- including Toolset.
this is not the first site this has happened on so it is a recurring issue.
I did a quick run through your plugins and the issue is being caused by the "WP Editor".
Once I disabled this plugin then the backend returned to normal. Not sure what additional functions this plugin gives but disabling it will restore your plugins page to normal.