Crafting Kingdom, Ad Will Not Close

I know about tapping on the top right and left to get an ad to close in Crafting Kingdom, but I currently have an ad that will not close no matter what I do.
It is from Idagio Classic Music. I have tried taking the app out of the app switcher, then reloading it, but no matter what I do, this one ad always comes up.
So currently I can not watch videos to earn gems since this is the only one that comes up and I am unable to close it!
Any help would be greatly appreciated!
-Chris