A database error has occurred.  Did you forget to run maintenance/update.php after upgrading?  See: https://www.mediawiki.org/wiki/Manual:Upgrading#Run_the_update_script<br />
Query: SELECT  img_size,img_width,img_height,img_bits,img_media_type,img_major_mime,img_minor_mime,img_metadata,img_timestamp,img_sha1,img_user,img_user_text,img_description  FROM `image`  WHERE img_name = 'Dinesh_Mini-Grid_Financing_-_Enabling_the_Role_of_Local_Bank.pdf'  LIMIT 1  <br />
Function: LocalFile::loadFromDB<br />
Error: 1927 Lost connection to backend server: connection closed by peer (server3: Generated event) (database_maxscale:4006)<br />