all my sites with JFBConnect stopped working yesterday

Hi,
I think it might be something related to a change of facebook? I couldn't find any update. What should i do to have it working again?
I use kunena and JFBC as only login option so now noone have access.

Thank you for your help.

I also get this error in one of my websites www.kyusho.com.tw

Got error 28 from storage engine SQL=SELECT a.id, a.title, a.alias, a.title_alias, a.introtext, a.checked_out, a.checked_out_time, a.catid, a.created, a.created_by, a.created_by_alias, CASE WHEN a.modified = 0 THEN a.created ELSE a.modified END as modified, a.modified_by, uam.name as modified_by_name,CASE WHEN a.publish_up = 0 THEN a.created ELSE a.publish_up END as publish_up,a.publish_down, a.images, a.urls, a.attribs, a.metadata, a.metakey, a.metadesc.....

SOLVED!
the problem was that the disk was full and many SQL process were failing.
I just deleted old big backups and everything went normal in all the sites of the server.