That is odd. It looks like we can no longer generate the links from dreamweaver after facebook made an update. The script link has to have a nonce attribute that ties it to the url you are liking somehow.
I'll have to remove that functionality from the extension unfortunately. It looks like facebook has made it easy to generate those links manually though, so it should be easy to add still. Just use this form:
https://developers.facebook.com/docs/plugins/like-button/
Sorry for the confusion and thank you for bringing this to my attention.