diff --git a/src/identityApiClient.ts b/src/identityApiClient.ts
index 5af3cc4a..1bf253dd 100644
--- a/src/identityApiClient.ts
+++ b/src/identityApiClient.ts
@@ -234,7 +234,7 @@ export default function IdentityAPIClient(
                 false
             );
         } catch (err) {
-            const errorMessage = (err as Error).message || 'Unknown Error';
+            const errorMessage = (err as Error).message || err.toString();
 
             mpInstance._Store.identityCallInFlight = false;
             invokeCallback(