well that's the case: I don't have to login to the sso, but if I use a sso host that totally not exsit, the problem will come out; and if I use another available sso (even if I cannot login), then it works.
maybe you can try: (notexist.zoom.us)
then the explore shows empty page because it does not exist and you can try to use the mac client to login to your email account
then you may find that you cannot login, and you cannot attend any meetings, also cannot register.
I think it's because the wrong sso lead to an internet failure because the server doesn't exist.
I'm not sure if the same problem would apply to you, but it happens to me.
i can provide with screenshots if you need.
Thanks!