Fix extractHeaderStatus to handle undefined and non-string messages (#2393)

* Fix extractHeaderStatus to handle undefined and non-string messages

* Fix unsafe casts

---------

Co-authored-by: Laurent Nguyen <languye@microsoft.com>

src/Platform/Fabric/FabricUtil.ts

@@ -37,7 +37,7 @@ const requestFabricToken = async (): Promise<void> => {
 
     scheduleRefreshFabricToken();
   } catch (error) {
-    logConsoleError(error as string);
+    logConsoleError(error instanceof Error ? error.message : String(error));
     throw error;
   } finally {
     lastRequestTimestamp = undefined;