<ul><li>foot.php: Added null guard on $webdetails["enable_follow_feature"] inside script block — was injecting PHP warning HTML causing SyntaxError</li><li>main.template.php: Added ?? null guards on all unguarded $_SESSION accesses inside script blocks (uid, activeacctid, role, YPSiteLinkID, YPTemplateID, live_meet io.emit calls)</li><li>accounts.php: Fixed GROUP BY SQL incompatible with only_full_group_by mode — was causing Fatal error that aborted rendering of the script block (root cause of switchOrg/loadmyCLients/loadmySubsidiaries/loadmyAffiliates ReferenceErrors)</li><li>accounts.php: Fixed owner_org_query UNION missing columns (acct_keyfk, company_icon, company_type, company_url, company_phone) causing Undefined array key warnings</li><li>accounts.php: Fixed all unguarded $_SESSION/$_GET accesses in commented-out JS code inside script block</li><li>toolbar.php: Fixed $ridval undefined when rids=0 or 1 — added default case to switch</li><li>OrganizationController.php: Added null guards on request["rids"], request["CategoryID"], request["sitelinkid"], request["siteid"], request["companyID"]</li></ul>