Database suddenly not accessible - error 403

Hi,
I'm running a database for my mobile game at https://ftp.brusgames.altervista.org...s/display1.php which has been running for months without issues, but starting yesterday/today, it is no longer accessible from the game or via browser - it throws Error 403 for every request:

Error 403
You can't access to the requested page or directory.
This can be due to:

The index file, usually index.html, for this directory is missing.
You are not connected with a valid IP address (IP: 94.142.239.110), if you use a proxy you can try to disable it and connect again.
The traffic towards this area of the site has been blocked or you are not allowed to access to the requested resource.

I guess that for some reason (too much traffic?), the database is now blocked - but the thing is that I can still access, edit it etc. via the php admin panel, and there is no warning either. How can I unblock it? I'd be happy to switch to a paid license, but I think it's not available in my country, unfortunately... (Czech Republic).

Thanks in advance!