diff --git a/web_src/js/features/admin/common.js b/web_src/js/features/admin/common.js
index b35502d52f..9b7b81db04 100644
--- a/web_src/js/features/admin/common.js
+++ b/web_src/js/features/admin/common.js
@@ -75,13 +75,16 @@ export function initAdminCommon() {
         }
         showElem('.open_id_connect_auto_discovery_url');
         break;
-      default:
-        if (document.getElementById(`#${provider}_customURLSettings`)?.getAttribute('data-required')) {
+      default: {
+        const customURLSettings = document.getElementById(`${provider}_customURLSettings`);
+        if (!customURLSettings) break;
+        if (customURLSettings.getAttribute('data-required')) {
           document.getElementById('oauth2_use_custom_url')?.setAttribute('checked', 'checked');
         }
-        if (document.getElementById(`#${provider}_customURLSettings`)?.getAttribute('data-available')) {
+        if (customURLSettings.getAttribute('data-available')) {
           showElem('.oauth2_use_custom_url');
         }
+      }
     }
     onOAuth2UseCustomURLChange(applyDefaultValues);
   }