Just installed fedora 31 on my notebook, installed snapd and, after, spotify usign snap. Installation went well, but if I open the application and try to login using facebook, nothing happens if I click on blue button ‘Login using facebook’ 
Is there anything in the journal? On my machine I can see the following logged:
dbus-daemon[2142]: [session uid=1000 pid=2142] Activating service name='io.snapcraft.Launcher' requested by ':1.967' (uid=1000 pid=929713 comm="snapctl user-open https://login2.spotify.com/login")
dbus-daemon[2142]: [session uid=1000 pid=2142] Successfully activated service 'io.snapcraft.Launcher'
io.snapcraft.Launcher[2142]: userd.go:98: Starting snap userd