diff --git a/src/auth/hooks/useAuthParameters.ts b/src/auth/hooks/useAuthParameters.ts
index c2a671799..d02ece4b2 100644
--- a/src/auth/hooks/useAuthParameters.ts
+++ b/src/auth/hooks/useAuthParameters.ts
@@ -12,7 +12,7 @@ export const useAuthParameters = () => {
 
   return {
     requestedExternalPluginId,
-    fallbackUri: fallbackUri === "null" ? "/" : fallbackUri,
+    fallbackUri: fallbackUri === "null" || !fallbackUri ? "/" : fallbackUri,
     isCallbackPath: location.pathname.includes(loginCallbackPath),
     setRequestedExternalPluginId,
     setFallbackUri,