I have been getting a message all day, you have experiened a error we are working hard to fix it

I am wondering if your browser went back to the old version.  Click on this link and make sure that you follow the steps for your browser.  Also you might want to try the game on another browser instead of what you always use.  Another idea, would be to uninstall the game from Facebook and reinstall it again.  You won't lose your levels because Facebook has saved your progress on their servers.

Browsers

https://community.king.com/en/candy-crush-saga/discussion/218696/web-browser-update   

And here is another troubleshooting link and this is for Facebook.