Error When Trying to Save Documents

« MODx Parse Error »
MODx encountered the following error while attempting to parse the requested resource:
« Execution of a query to the database failed - Got error 28 from storage engine »
      SQL: SELECT DISTINCT tv.*, IF(tvc.value!='',tvc.value,tv.default_text) as value FROM `bfs_modx`.`modx_site_tmplvars` AS tv INNER JOIN `bfs_modx`.`modx_site_tmplvar_templates` AS tvtpl ON tvtpl.tmplvarid = tv.id LEFT JOIN `bfs_modx`.`modx_site_tmplvar_contentvalues` AS tvc ON tvc.tmplvarid=tv.id AND tvc.contentid = '5' LEFT JOIN `bfs_modx`.`modx_site_tmplvar_access` tva ON tva.tmplvarid=tv.id WHERE tvtpl.templateid = '6' AND (1='1' OR ISNULL(tva.documentgroup)) ORDER BY tv.rank;
 
Parser timing
  MySQL: 	0.0007 s	(1 Requests)
  PHP: 	1255005176.3780 s	 
  Total: 	1255005176.3787 s

« MODx Parse Error »
MODx encountered the following error while attempting to parse the requested resource:
« Execution of a query to the database failed - Got error 28 from storage engine »
      SQL: SELECT stv.name,stc.tmplvarid,stc.contentid,stv.type,stv.display,stv.display_params,stc.value FROM `bfs_modx`.`modx_site_tmplvar_contentvalues` stc LEFT JOIN `bfs_modx`.`modx_site_tmplvars` stv ON stv.id=stc.tmplvarid WHERE stv.name='blog_day' AND stc.contentid IN (5,7) ORDER BY stc.contentid ASC;
      [Copy SQL to ClipBoard]
 
Parser timing
  MySQL: 	0.0033 s	(7 Requests)
  PHP: 	0.0358 s	 
  Total: 	0.0390 s