<ul><li>Fixed usersearch.php: $getCompany null array access on commented JS line 336; $super_admin undefined → $_SESSION guard</li><li>Fixed searchdata.php: all $_POST accesses guarded with ?? null/""</li><li>Fixed accounts.php: checkIFOwnerRole() guards empty session role</li><li>Fixed search/invite.php: enabled error_reporting; all $_POST accesses guarded; ucn null guard</li><li>Fixed search/send_email.php: guarded $_REQUEST sitelinkid, $site null access, $_SESSION super_admin</li><li>Fixed inc/ajax.php, avuser_get_info.php, update_avuserinfo.php: guarded all $_POST accesses</li><li>Fixed clientsAccounts.php: $_REQUEST[rids] guarded; SQL query uses (int) cast on session var</li><li>0 PHP errors confirmed on all 3 tabs: accounts, invite_user, org_members</li></ul>