Sorry to hear you're having difficulties loading Scrabble on your PC. Hopefully the following solutions will help:
If you are unable to connect to SCRABBLE on Facebook, the first step is to ensure your browser is set to allow third-party cookies. Below you will find instructions for several major browsers.
A simpler solution may be to disable "Block third-party cookies and site data" entirely by unchecking the box for that setting.
Hope this helps!