Hello!
In the technical support of hosting said that all the technical parameters are met and there are no restrictions.
I added in the .htaccess
php_value upload_max_filesize 200M
php_value memory_limit 512M
php_value max_execution_time 300
But that didn't help.
In the console, when you click the "Save" button, you see the following error:
Uncaught SyntaxError: Unexpected token < in JSON at position 0
/administrator/index…x=ultimate&id=10#:1
at JSON.parse (<anonymous>)
at Object.success (megamenu.js?bab844e2b69384212ae58020d98932c8:577)
at u (jquery.min.js?bab844e2b69384212ae58020d98932c8:2)
at Object.fireWith [as resolveWith] (jquery.min.js?bab844e2b69384212ae58020d98932c8:2)
at C (jquery.min.js?bab844e2b69384212ae58020d98932c8:2)
at XMLHttpRequest.n (jquery.min.js?bab844e2b69384212ae58020d98932c8:2)
Could this be a problem?