Why am I getting the error, "This endpoint supports POST requests only"?

Symptom
Applies to
Resolution
  1. Have the user use an incognito window or try a different browser.
  2.  Have the user clear their cache and cookies, restart their browser, and then try logging in again.
Additional information

This is possibly due to a browser extension being used on Chrome. If the above steps do not work, please try disabling your browser extensions.

Page ID
39537