(This also happens with auto-discovery, but the IP and port and not requested).
Versions running:
HA: All latest versions
Unifi Protect 2.11.21 (looks official to me, not EA)
Dream machine UniFi OS 3.2.12 (looks official to me, not EA)
I am using the same login as I use when connecting to my dream machine locally (via the IP). If I enter wrong credentials, then I get an error in the tune of that (“Invalid authentication”).
Deleting and reconfiguring unifi network with the same credentials works.
I’ve checked and the user seems set up as per the instructions on the integration: