Funamo not working
When you allowed all apps during summer, you probably disabled Funamo protection. Then your kid can simply remove Funamo. You can install it again from Google Play and set it up again. Just remember NOT to create a new Funamo account, just use your old account. Otherwise, it will not recognized your license because of different account. I have done this many times in the past and you will get your license after you set it up again.
Sorry. I posted this as a comment.