Have you made any changes to your CMS recently? as per your other topic you were thinking about upgrading it etc or is the php version still 7?
302 would mean that perhaps something isn’t quite right with url redirection on your server, it is then redirected to what appears to be correct CMS address there.
Presumably that’s not the only player with such issue? as it seems like some configuration mismatch on the server side.
In your other topic Alex mentioned some, perhaps more suitable ways of Xibo installation, perhaps you could try to explore that? MySQL support must be enabled in PHP with xibo 1.7.5
Docker on VPS should be much more straightforward for you to manage.
Alternatively you could also consider using our Cloud Hosting.