# 4034
source: https://developer.mastercard.com/open-finance-us/documentation/errors/error-codes/4034/index.md

This error occurs when the token associated with the end user account has expired or is invalid.

|             Title             |                                                            Details                                                             |
|-------------------------------|--------------------------------------------------------------------------------------------------------------------------------|
| **Aggregation Status Code**   | 4034                                                                                                                           |
| **Remediation Category**      | Verify Account or Data State                                                                                                   |
| **HTTP Status**               | 400                                                                                                                            |
| **Error Type**                | Account Error                                                                                                                  |
| **Data Connect Alert**        | No associated alert.                                                                                                           |
| **Error Message**             | Access tokens must be managed at the institution's website.                                                                    |
| **Common Causes**             | This error can occur when an end user's account is revoked/deleted and the underlying token is deactivated and is now invalid. |
| **Troubleshooting Steps**     | Create a new Customer ID and request the end user to reconnect their account in order to get a new token.                      |
| **Data Connect Fix Eligible** | No.                                                                                                                            |
| **Retriable by End User**     | No.                                                                                                                            |
| **Access to Latest Data**     | You will be unable to access the latest data for this user's account until the issue is resolved.                              |

[Full Error List](https://developer.mastercard.com/open-finance-us/documentation/errors/error-list/index.md) \| [Account Errors](https://developer.mastercard.com/open-finance-us/documentation/errors/account-errors/index.md)