Zoom Login Issues - HTTP 401 error

If users receive a 401 error when attempting to login to Zoom:

1.Clear cache

2. Manually enter URL http://zoom.us/signin

(The error is triggered if users go to http://zoom.us/Signin - note difference in capitalization.  Apparently the incorrect URL now appears higher in Google searches)

Source:  https://community.zoom.com/t5/Meetings/Error-code-401/td-p/10629