Thread:Project:Support desk/Permission to run script/reply

$wgDBadminuser and $wgDBadminpassword used to contain credentials for database access. This has nothing to do with any MediaWiki user account. I guess, in LocalSettings.php, you need to grant your user group (if your MediaWiki is account an admin, then for the sysop group) the right "maintenance":

$wgGroupPermissions['sysop']['maintenance'] = true;

See Manual:User_rights for more information!