47+ Received Http Code 404 From Proxy After Connect PNG. This was preventing me from updating the git repo or pulling changes. The isa server requires authorization to fulfill the request.
If yes, please refer to below thread to check if it could be fixed. Status codes are issued by a server in response to a client's request made to the server. In general it works and does what it should.
According to your error message, the issue was caused by proxy.
Are you sure your proxy is using basic auth? Status codes are issued by a server in response to a client's request made to the server. This response code is an error page that indicates the visitor was able to communicate 407 : It turns out the issue was the 'add proxy server configuration to git/mercurial' option was ticked under options > network.