diff --git a/src/renderer/src/pages/home/Messages/Blocks/ErrorBlock.tsx b/src/renderer/src/pages/home/Messages/Blocks/ErrorBlock.tsx
index 43b6b40472..62b36202c5 100644
--- a/src/renderer/src/pages/home/Messages/Blocks/ErrorBlock.tsx
+++ b/src/renderer/src/pages/home/Messages/Blocks/ErrorBlock.tsx
@@ -7,13 +7,13 @@ import { removeBlocksThunk } from '@renderer/store/thunk/messageThunk'
 import {
   isSerializedAiSdkAPICallError,
   isSerializedAiSdkError,
+  isSerializedError,
   SerializedAiSdkAPICallError,
   SerializedAiSdkError,
   SerializedError
 } from '@renderer/types/error'
 import type { ErrorMessageBlock, Message } from '@renderer/types/newMessage'
 import { formatAiSdkError, formatError, safeToString } from '@renderer/utils/error'
-import { AISDKError } from 'ai'
 import { Alert as AntdAlert, Button, Modal } from 'antd'
 import React, { useState } from 'react'
 import { Trans, useTranslation } from 'react-i18next'
@@ -143,9 +143,9 @@ const ErrorDetailModal: React.FC<ErrorDetailModalProps> = ({ open, onClose, erro
   const copyErrorDetails = () => {
     if (!error) return
     let errorText: string
-    if (AISDKError.isInstance(error)) {
+    if (isSerializedAiSdkError(error)) {
       errorText = formatAiSdkError(error)
-    } else if (error instanceof Error) {
+    } else if (isSerializedError(error)) {
       errorText = formatError(error)
     } else {
       // fallback
diff --git a/src/renderer/src/types/error.ts b/src/renderer/src/types/error.ts
index fd1eb30a8f..2439eaa123 100644
--- a/src/renderer/src/types/error.ts
+++ b/src/renderer/src/types/error.ts
@@ -6,6 +6,9 @@ export interface SerializedError {
   stack: string | null
   [key: string]: Serializable
 }
+export const isSerializedError = (error: Record<string, unknown>): error is SerializedAiSdkError => {
+  return 'name' in error && 'message' in error && 'stack' in error
+}
 export interface SerializedAiSdkError extends SerializedError {
   readonly cause: string | null
 }
diff --git a/src/renderer/src/utils/error.ts b/src/renderer/src/utils/error.ts
index 7953c8ca1f..abb5cb6e6a 100644
--- a/src/renderer/src/utils/error.ts
+++ b/src/renderer/src/utils/error.ts
@@ -1,6 +1,10 @@
 import { loggerService } from '@logger'
-import { AiSdkErrorUnion } from '@renderer/types/aiCoreTypes'
-import { SerializedAiSdkAPICallError, SerializedError } from '@renderer/types/error'
+import {
+  isSerializedAiSdkAPICallError,
+  SerializedAiSdkAPICallError,
+  SerializedAiSdkError,
+  SerializedError
+} from '@renderer/types/error'
 import { AISDKError, APICallError } from 'ai'
 import { t } from 'i18next'
 import z from 'zod'
@@ -199,16 +203,16 @@ function getCircularReplacer() {
   }
 }
 
-export function formatError(error: Error): string {
+export function formatError(error: SerializedError): string {
   return `${t('error.name')}: ${error.name}\n${t('error.message')}: ${error.message}\n${t('error.stack')}: ${error.stack}`
 }
 
-export function formatAiSdkError(error: AiSdkErrorUnion): string {
+export function formatAiSdkError(error: SerializedAiSdkError): string {
   let text = formatError(error) + '\n'
   if (error.cause) {
     text += `${t('error.cause')}: ${error.cause}\n`
   }
-  if (APICallError.isInstance(error)) {
+  if (isSerializedAiSdkAPICallError(error)) {
     if (error.statusCode) {
       text += `${t('error.statusCode')}: ${error.statusCode}\n`
     }