Hi @clarko,
If this is an iOS Roon Remote, then please try disabling any Content Blockers:
- Go to Settings
- Tap Safari
- Tap Extensions
- Tap to turn off listed content blocker
Then, navigate to the Roon accounts page in Safari on the same device and try to log in there. If that login is successful, sign back out from the accounts page.
Then open Roon and attempt to login again.
Please let us know if this helps.