Error reason:
the GIT client has cached the wrong password. The account password is confused with the local storage and is incorrect; Generally, multiple git accounts will lead to such a situation. For example, your own git account and your git account in the company can be used together at the same time

simple method:
when cloning, bring the account and password and clone them together. The changed account and password will also be added to ~ /.Git credentials
http://username:password @git.coding.net/xxxxxxxx/xxxx.git/