Fatal: unable to access 'http://xx.xx.xx.xx/xxx/xxx.git/': Empty reply from server

When using Access Tokens to git clone, will encounter Empty reply from server. If git clone http://xxx.git can download without using Access Tokens, the reason for google search is that a proxy is used. The problem os is rhel8.6, but I have no problem using debian10 to add agents and use Access Tokens. What is the cause