Can't integrate Wwise into Unity project - Error, what to do?

Question

Hi,

I was about to integrate Wwise into my UnityGame.
I can't remember, but I think I chose not to include a backup project into the project and now I'm stuck with following error message:
"The installation of the Wwise Integration in this project failed and it could not be reverted automatically using the backup project. Please revert to the original project using source control or, if you created one, the backup project."

I can't select anything else or re-integrate Wwise into my UnityGame... Do I have to create a new game for it to work or is there another way for me to solve this problem?

Appreciate the help.