Remove Gimbal Clamp Error

I have had my drone for about a year now. Today I was flying it in one location perfectly fine, shut it off, drove to a new location and turned it on. On my phone it had an error that said "Remove Gimbal Clamp," as well as a beeping sound that came from the gimbal. I did not have the gimbal clamp on and no matter how many times I took the battery out or put a new one in, nothing worked. What do I do?