Intro

Sometimes it happens that accessing Gerrit, Subversion (SVN) or some other services behind Apache or NGINX reverse proxy with basic authentication (even with SSO involved) shows empty/blank page and 401 unauthorized error. Apart from other reasons one of the most frequent reasons why it happens is actually setting in the browser, which prohibits usage of basic authentication. If there are no other authentication options on server available, then server actually delivers empty page or shows 401 (Unauthorized) status code and error message.

Latest version of Edge no longer shows basic authentication login dialog when some server offers that option:

https://answers.microsoft.com/en-us/microsoftedge/forum/all/latest-version-of-edge-no-longer-shows-basic/3601252b-e56b-46c0-a088-0f6084eabe47

Checking basic authentication status in Edge browser

Workaround for Edge browser to allow support for basic authentication