407 error when accessing git repository

Symptom

When access git for operations, below error occurred:

fatal: unable to access '***': The requested URL returned error: 407

Cause

It is going through a proxy to access git repository and the proxy authentication is failed.

My case is because I set proxy in Windows environment variables but actually it is not required.

Solution

1. Use correct credentials if proxy is required.
2. Remove the proxies in git configuration and Windows environments.