https://bugs.winehq.org/show_bug.cgi?id=53090
--- Comment #2 from Dugan Chen thedoogster@gmail.com --- I did some more testing on my Fedora system 38. Roland Cloud Manager 3.0.1.
The sign-in link does nothing if: a) you use the wine package in Fedora's repositories, b) you just add it to Steam as a non-Steam game and launch it.
It works (opens the sign-in page in the default native browser, signs you in to Roland Cloud) if you: a) use the winehq-devel wine package, or b) use Proton Experimental.
Looks like this bug has been fixed.