This issue has been resolved now. It looks like it was the website DB problem.

Thanks for your attention.

Hi,
I was working in the admin area and was adding new lessons. All of a sudden I am getting this error. I am unable to access the Admin or any front-end pages now.

Please please any help with be much appreciated! Thank you.

JoomSEF Error - Could not save the SEF URL to database: MySQL server has gone away SQL=INSERT INTO `jos_sefurls` (`sefurl`, `origurl`, `priority`, `Itemid`, `metadesc`, `metakey`, `trace`, `sm_indexed`, `sm_date`, `sm_frequency`, `sm_priority`,`locked`,`host`) VALUES ('content', 'index.php?option=com_content&id=134&view=article', '15', '615', '', '', NULL, '1', '2012-09-07', 'weekly', '0.5',0,'')