@girish Thanks - I checked all these and it passed all the tests.

I've setup on a new domain and its working now so I will see if I can export the messages from the broken instance to the new.

It was a weird issue for sure.

Hello,

I've setup Matrix on my server, and while initially all seemed to be working well it since is coming up with an error on the Desktop Element client when trying to login;

Homeserver URL does not seem to be a valid Matrix Homeserver

The Element Web Service, or even an iOS client can connect fine. Its only the Desktop client on multiple different PCs (MacOS / Linux) that refuse to connect. Anyone any ideas?

I've set all the Preferred domain stuff etc.

Thanks.