Could be any number of reasons, none of which will be apparent to someone without knowledge of the request you are sending, or the application you are working with.
look I give the BREAD for one controller for one part of the app but when I giving it to another part and make them all never work again.
rollback null value to me
That doesn't give any more insight into your issue. If you need help, you need to give context to whatever you are attempting to do; what routes have you defined; what controller actions are you hitting; what request are you making from browser/API client; what response are you expecting; what response are you getting; are there errors or exceptions in the logs; what steps have you taken to debug the issue?
Maybe then we will be able to give you some useful advice, or be better informed to ask more appropriate questions to help debug the issue.