Candy crush saga not loading on Facebook

Cuddles

Opens in Facebook,when I push play it crashes screen goes back ,to home screen 

StuckInATree

If you're playing from FB then you might want to have a go at the suggested troubleshooting: https://care.king.com/en/candy-crush-saga/cant-get-your-games-to-load-on-facebook-check-this-out

If you're on windows 10 though, it might be better to install the game app directly from the Windows store. Smoother than playing through a browser in my opinion.