<ul><li>Fixed get.management.php: $_POST["menu"] undefined → ?? 0; $siteid → ?? 0; $siteConfigMenuResult["ImageFileB"/"Menu"] null-unsafe; added $activeacctid = $_SESSION["activeacctid"] ?? 0 (missing from scope).</li><li>Fixed page.management.accordion.php: all $siteConfigMenuResult[...] and $_SESSION["super_admin/rid"] accesses missing null-safe operators; $ctrlpanel/$config multisite null guards.</li><li>CRITICAL FIX details.php:755/761 — Fatal TypeError: in_array() on null from json_decode(null). Fixed: json_decode($x ?? "{}") ?? [].</li><li>Fixed display.php: $view_startingmodule undefined when starting_module!=1 (only assigned inside if-block); $moduleInfoResult null-unsafe on type/starting_module/display/redirect_to_web/Menu; $moduleInfoResult["module_ai_feature"] wrong key (column join commented out) — replaced with $aiQueryResult["ai_feature"] ?? 0; fixed includeFileID/IncludeFileID case mismatch in empty() check.</li><li>Result: 0 PHP errors on both HTML (menu_option_id=1) and Module (menu_option_id=2) page types.</li></ul>