I just tried to register with Facebook and it seems to have worked. The following message was displayed:
ข้อความ
Facebook ไปรไฟล์ได้เชื่อมต่อเรียบร้อยแล้ว
If you're still seeing an error somewhere, can you tell me what you're using to generate your SEF URLs? If you're using a 3rd party extension like sh404SEF, AceSEF, etc, please set it to 'skip' creating URLs for JFBConnect. That should fix your issue.
Thanks,
Alex