C7 running 2.3.8.119 with Hub Login Security enabled.
I had "Hub UI SSL only" turned on. After I turned it off, logins stopped working on http://<my hub IP>. They still work fine on https://<my hub IP>.
Edit: When I try to log in on http://<my hub IP>, it redirects me back to the login screen with this URL:
/login?loginRedirect=%2F
@gopher.ny @bobbyD Any ideas?