critical error from all-in-one-wp-migration

We received an email saying:

Error Details
=============
An error of type E_COMPILE_ERROR was caused in line 64 of the file /customers/5/3/3/ckw8p854v/webroots/r1088439/wp-content/plugins/all-in-one-wp-migration/all-in-one-wp-migration.php. Error message: require_once(): Failed opening required ‘/customers/5/3/3/ckw8p854v/webroots/r1088439/wp-content/plugins/all-in-one-wp-migration/functions.php’ (include_path=’.:/usr/share/php’)

Our current plugin: All-in-One WP Migration (version 7.68)

At first, the website only showed “There has ben a critical error on this website”

Now it seems to be available but with this as a header:

Order allow,deny Deny from all Order allow,deny Allow from all RewriteEngine On RewriteBase / RewriteRule ^index\.php$ – [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] Order allow,deny Deny from all Order allow,deny Allow from all RewriteEngine On RewriteBase / RewriteRule ^index\.php$ – [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] Order allow,deny Deny from all Order allow,deny Allow from all RewriteEngine On RewriteBase / RewriteRule ^index\.php$ – [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] Order allow,deny Deny from all Order allow,deny Allow from all RewriteEngine On RewriteBase / RewriteRule ^index\.php$ – [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L]

We cannot log in to change anything. I see some people suggesting to remove /disable plug ins but how can we do that without logging into the website. On the log in for the recovery page my usual log in does not work. I tried “lost password” and it says my account doesn’t exist.

The recovery mode page also has this header: Order allow,deny Deny from all?Order allow,deny Allow from all?RewriteEngine On RewriteBase / RewriteRule ^index\.php$ – [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L]?Order allow,deny Deny from all?Order allow,deny Allow from all?RewriteEngine On RewriteBase / RewriteRule ^index\.php$ – [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L]?Order allow,deny Deny from all?Order allow,deny Allow from all?RewriteEngine On RewriteBase / RewriteRule ^index\.php$ – [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L]?Order allow,deny Deny from all?Order allow,deny Allow from all?RewriteEngine On RewriteBase / RewriteRule ^index\.php$ – [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L]

Can anyone help me fix this?

The page I need help with: [log in to see the link]