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Thanks @pillow6. Facebook seems to be the cause of a lot of issues from what I can gather.
You would be much better off downloading the Windows 10 Candy Crush app and playing through that instead of Facebook.
A lot of features are aimed at mobile users only, so this could explain your lack of Power Pops and Treat Machine..
@pillow6 there are far too many reasons that would cause an app to close on opening for me to go into here. You would be much better off googling the issue yourself.
You will find that the last Creator update on Windows 10 caused a lot issues for users.
Some things that can cause your issue are your antivirus, Windows Firewall, ad blockers, the Microsoft Store cache and the app itself may be corrupted.
The easy issues for you to start with are the Microsoft Store and the app itself. Clear the Microsoft Store and reset the app.