Humm... sounds like a firewall thing that is preventing or applying some sort of policy. I sometimes have problems logging from work to things, because they enforce a minimum of two TLS algos, and some of the recent stuff only uses TLS 1.3.

If it worked before and stopped working, try to flush the browser cache or even attempt to connect via 3/3/5G network without connecting through your house/place wireless. If that works, then it's something along the lines I am saying.