Link errors and troubleshooting

Errors in the Link flow

Link error codes

Any errors during Link will be returned via the Link flow; for details, see the guide for your specific platform. Since any failed user attempt to log on to a financial institution for any reason, even an incorrect password, will result in a Link error, you should expect to see the occasional error during Link. In most cases, Link will guide your user through the steps required to resolve the error.

The most common case in which you will need a special flow for Link errors is the ITEM_LOGIN_REQUIRED error. For instructions on handling this error, see Updating an Item.

For more details, or if you need to troubleshoot a problem involving an error message from the API, see Item errors.

Missing institutions or "Connectivity not supported" error

Symptom

Your user cannot find their financial institution in Link, even though it is one of the 11,500+ institutions supported by Plaid.
Your user experiences a "Connectivity not supported" error message after selecting their institution in Link.

Common causes

The institution does not support one of the products specified in Link initialization.
The institution is associated with a country not specified in Link initialization.
The institution is associated with a country your Plaid account hasn't been enabled for.

Troubleshooting steps

Make sure not to initialize Link with any products your application isn't using.

Make sure Link is initialized for the country in which the institution operates.

If the problem occurs in Production but not in Sandbox or Development environments, your Plaid developer account may not have been enabled for the country in which the institution operates. Submit a product access request via the Plaid developer dashboard to gain access.

Institution unhealthy

Symptom

When a user tries to connect their account, they receive a message in Link that Plaid may be experiencing connectivity issues to that institution. For more details, see Institution status in Link.

Common causes

Plaid's connection to the institution is down or degraded.

Troubleshooting steps

If your user cannot link their account, ask them to try again later.

If possible, provide a manual, backup flow for the user to enter account information.

Duplicate Items

Symptom

Your user has multiple Items that seem to represent the same underlying set of accounts.

Common causes

The user added the same Item more than once.

Troubleshooting steps

See Preventing duplicate Items for instructions on preventing this scenario.

Missing accounts

Symptom

Some of the end users' accounts are not present in the Item, or a new account added by the user does not appear in the Item.

Common causes

The user linked their account via an OAuth flow but did not grant your app permission to all of their accounts.
The user linked their account via an OAuth flow but did not grant your app permission to any new accounts.

Troubleshooting steps

If the Item is at an institution that uses OAuth, prompt the user to enter the update mode flow, which will allow them to change the permissions they have granted to your app.

If accounts disappeared after the Item was linked, see the Troubleshooting guide for INVALID_ACCOUNT_ID.

Link flow is failing

Symptom

The Link flow is not working correctly for the user -- the onSuccess callback may not be sent, Link may not load, or redirects may not function correctly.

Common causes

Third party software, such as ad-blocking browser extensions, may be interfering with Link.
The end user linked their account via an OAuth flow and OAuth is not configured correctly.

Troubleshooting steps

Ask the end user to temporarily disable ad-blockers or other third-party browser extensions that may be interfering with Link and try again.

If the Item is at an institution that uses OAuth, see Troubleshooting common OAuth problems.

OAuth not working

First, verify these settings before reviewing the more detailed OAuth troubleshooting guides below:

Ensure your redirect URI is configured in the Plaid Dashboard

For web, iOS SDK, or React Native iOS integrations, ensure the redirect_uri parameter is set in the /link/token/create call for all Link sessions, including Link in update mode.

For Android SDK integrations, ensure that your Android package name is registered in the Plaid Dashboard and that the android_package_name parameter is set in the /link/token/create call for all Link sessions, including Link in update mode

For iOS SDK integrations, check that the redirect URI has been associated with an Apple App Association file, that your application has the associated-domains entitlement for that URI, and that you are calling `continue(from:)` in your application

For React Native integrations, check the above for iOS and Android and ensure you are using the useDeepLinkRedirector hook

If none of the steps above resolve your problem, see the specific OAuth troubleshooting guides below. If you do not see your problem listed, or following the guide does not fix the problem, contact Support.

OAuth institutions not appearing in Link

Symptom

Institutions that use OAuth, such as Capital One or Wells Fargo, are not appearing in the Link UI.

Common causes

A redirect_uri or android_package_name was not specified in the call to /link/token/create.
The redirect URI or Android package name was not allowlisted on the Plaid Dashboard.

Troubleshooting steps

Make sure the redirect_uri (or, for Android, android_package_name) is specified in the call to /link/token/create.

Make sure to list your redirect URI or Android package name in the Plaid Dashboard. This setting can be found under Team settings -> API -> Allowed redirect URIs (or Allowed Android package names) -> Configure.

OAuth flow shows unsupported browser warning

Symptom

Upon entering their institution's OAuth flow, users see a warning that their browser is not supported.

Common causes

The Plaid integration is using a webview with an incorrectly configured user agent.

Troubleshooting steps

Use an official Plaid mobile SDK rather than a webview-based integration. Mobile SDK integrations are strongly recommended over the use of webviews.

Ensure that the webview uses a valid user agent matching one commonly found in the wild.

OAuth redirects not working

Symptom

Users are not being redirected back to Link after completing their institution's OAuth flow.

Common causes

Android

An android_package_name was not specified in the call to /link/token/create.
An incorrect android_package_name was specified in the call to /link/token/create.

iOS

Universal Links are not correctly configured.

Troubleshooting steps

Android

Make sure the android_package_name is correctly specified in the call to /link/token/create.

iOS

Test the apple-app-site-association file by taking the domain (not the full path) of the redirect_uri and accessing the corresponding location on Apple's CDN using a web browser. For example, if the redirect_uri is https://app.wonderwallet.com/plaid, then visit https://app-site-association.cdn-apple.com/a/v1/app.wonderwallet.com.

If the contents of the apple-app-site-association blob do not appear, then Apple does not have a copy of the apple-app-site-association file at the correct location needed to invoke Universal Links. See Apple's Universal Links documentation for information on how to create, name, and locate this file.

Confirm that the apple-app-site-association contains the exact and correct path for the redirect_uri.

Confirm that the apple-app-site-association is not malformatted. If combining iOS 12 style (paths:) and iOS 13 or higher style (components:) formats, the two should be in separate sections of the file, as in this example app site association file.

Ensure that the associated domains have been added as entitlements to your app. For instructions, see Apple Universal Links documentation.