Can't enable maintenance mode

Are you able to save other general settings?

Hi @swallery try the following, see if this helps you.

Configure the PHP max_input_vars setting
These settings are sometimes available in the php.ini directive called max_input_vars
Edit the server php.ini or in some cases you can add a secondary php.ini inside the account (domain) folder.

Configure the php.ini like this:
max_input_vars = 3000

You may need to do this via .htaccess (on a shared host for instance), use:
php_value max_input_vars 3000

That is good news 🙂

I am marking this support thread as resolved.

Thank you