CC Cleaner issues running Android 8

We are running the free version of CCCleaner on both our Android 8 smart phones. About a week ago, the App started asking for us to push an "ON" button to allow CCCleaner to fully clean the phones. However, we haven't figured out where this "ON" button is located so we can continue using the product. Anybody have any ideas to help us! Thanks much.

Andriod settings> accessibility, choose ccleaner in the list and it should be self explanatory at that point.

Outstanding! It worked!! Thanks much!