« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« Execution of a query to the database failed - SELECT command denied to user 'abc_admin'@'localhost' for table 'modx_site_tmplvars' »
      SQL: SELECT tv.*, IF(tvc.value!='',tvc.value,tv.default_text) as value FROM `abc_cms`.`modx_site_tmplvars` tv INNER JOIN `abc_cms`.`modx_site_tmplvar_templates` tvtpl ON tvtpl.tmplvarid = tv.id LEFT JOIN `abc_cms`.`modx_site_tmplvar_contentvalues` tvc ON tvc.tmplvarid=tv.id AND tvc.contentid = '26' WHERE tvtpl.templateid = '13'
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Parser timing
  MySQL: 0.0034 s(3 Requests)
  PHP: 0.0206 s 
  Total: 0.0240 s 
Error while inserting event log into database.