Configure.php has gone bonkers! Help

Hi

I visited my shop this afternoon and was greeted by a red bar at the top of the screen saying

"Warning: I am able to write to the configuration file: /home/northwic/public_html/shop/includes/configure.php. This is a potential security risk - please set the right user permissions on this file (read-only, CHMOD 644 or 444 are typical). You may need to use your webhost control panel/file-manager to change the permissions effectively. Contact your webhost for assistance."

Now, I checked this and the CHMOD permissions are 644 (as they always have been). I've changed them to 444, but that made no difference.

This seems like a bug - can anyone help me urgently?

The red bar also gave me an FAQ - https://www.zen-cart.com/tutorials/index.php?article=90

Now, I checked this and the CHMOD permissions are 644 (as they always have been). I've changed them to 444, but that made no difference.
Normally, 444 can not be set with a FTP client and must be set via your account file manager...
If you do not have this contact your host as they have altered something

Thanks. Changing the permissions through Cpanel sorted it.

I suspect my webhost has changed something as they're upgrading their servers.