Hi Peter,
Probably you have that issue first time, and you're using Helix much longer, right?!
"Warning: Zend OPcache API is restricted by 'restrict_api' configuration directive"
...means that your PHP configuration has a setting that restricts access to OPcache functions (like opcache_get_status() or opcache_reset()) unless they're called from specific file paths.
How to Fix It
You’ll need to edit the php.ini file and either remove or adjust the opcache.restrict_api directive.
Option 1: Disable the restriction entirely
In your php.ini (or in .user.ini / .htaccess, depending on your setup):
opcache.restrict_api =
Just leave it empty, which removes the restriction.
Option 2: Allow a specific path
If you only want to allow OPcache access from certain directories, specify the full path:
opcache.restrict_api = /var/www/my-allowed-folder
This allows PHP scripts located in /var/www/my-allowed-folder to use OPcache functions.
Path you already know from the error message, remember only folder, not file.
After changes, restart your web server or PHP-FPM.
If above will not help, contact with Hosting Provider Support! From our side we cannot change anything on your server.