identical code for remote.api on client side but different response.

I have added some api functions to add alias domain, while my server it is working just fine, but on client machine, I am getting the response

Code:

"code":"remote_fault","message":"The Session is expired or does not exist.","response":false}

what could be the reason for this?
both machine is having ubuntu20.04 and php8

 

Thanks. This is resolved. the issue was due to ispconfig codebase was different version and db version was older.
when I update ispconfig with force it updated the database and the error is resolved.