I had the same issue (title was showing but nothing else) but have woken up this morning and it is working again. Someone else said Facebook did an update yesterday which may have caused the issue but has now been resolved. Has your issue resolved now too? Good luck!
@milap it was definitely installed and on the frontpage’s sidebar. I have woken this morning and it is working again though (again without changing anything) – so perhaps as one of the others commented it was an issue with facebook that they fixed as i slept. Thanks for your reply.
