Have you found the cause of this problem. I had the same error with my unity project and it solved itself. I wasn't doing anything with the code. I just rebuild twice. I don't know if building the project was one of the reason why the error go away.

I had the same error with my unity project and it solved itself, probably because I just rebuilt it twice. I did not do anything with the code. I don't know if building the project was one of the reason why the error go away.

I'm still looking forward to better solutions.