Sometimes it happens that accessing Gerrit, Subversion (SVN) or some other services behind Apache or NGINX reverse proxy with basic authentication shows empty 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.
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