diff --git a/src/lib/sandbox/main-serialization.ts b/src/lib/sandbox/main-serialization.ts
index 6e6c9e81..780d4631 100644
--- a/src/lib/sandbox/main-serialization.ts
+++ b/src/lib/sandbox/main-serialization.ts
@@ -127,9 +127,10 @@ const serializeCssRuleForWorker = (cssRule: any) => {
   }
   return obj;
 };
-
+let ErrorObject: any = null;
 const serializedValueIsError = (value: any) => {
-  return value instanceof (window.top as any).Error;
+  ErrorObject = (window.top as any)?.Error || ErrorObject;
+  return value instanceof ErrorObject;
 };
 
 export const deserializeFromWorker = (