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The bulletin "Error Validating Admission Token" occurs while using Facebook/Messenger primarily by two groups of users; one are regular users accessing messenger and other are developers who are enabling Facebook login using the API.

Error Validating Admission Token – Messenger

The fault bulletin is mostly related to the security procedure which Facebook implements when you admission its platform. If any of the steps are not consummate, invalid, or expired, you will receive the mistake message. Since there are ii cases where users might experience this fault, nosotros have listed two solutions.

What causes Fault Validating Access Token on Facebook?

Like mentioned earlier, the error bulletin 'mistake validating access token' non is similar other normal error messages experienced by the finish-user. The reasons for this error are:

• The session in Messenger against your account is somehow invalid or has expired.
• The access token of Facebook which you are using with the API is expired. This happens in a lot of cases in an application'due south development environment considering the access token is simply valid for a limited time earlier it has to be obtained again (for developers).
• The user has inverse the password or has logged himself out from all connected devices because of security bug.
• Facebook has deliberately logged you lot out of messenger for security reasons.

In reference to the solution listed below for developers, nosotros presume that you know the basics of the API call you are making using access tokens. If you are a complete beginner in the development environment, we recommend reading some detailed coding material to gain insight into access tokens.

Solution 1: Refreshing Messenger'due south Local Data (for error in messenger)

Normal users may experience this error bulletin when trying to log into the messenger or while switching between different accounts. This is no more a mere bug in your android device. Your smartphone keeps rails of all the access tokens related to Messenger. If whatsoever of them becomes invalid or is not updated automatically, y'all may receive the error message.

Here, we will refresh the data of your Messenger application. Make sure that you have your username and password at hand because y'all may be asked to enter information technology.

1. On your Android device, open upwardly Settings and navigate to Applications Manager.
2. Search for the entry of Messenger and open up information technology.

Messenger – Android Application Managing director

3. Once in the application settings, select Clear data and articulate both, the application information and the cache.

Clearing information – Messenger

4. Close the settings app and restart messenger later on endmost the application first. Now attempt logging in and see if the error message is fixed.

Solution two: Checking expired access token (for developers)

Admission tokens are items used by applications which are used to make API requests on behalf of the user. Mainly, the access token represents the authorization of a specific awarding so it tin can either authorize the login or admission some information of the user.

Facebook's guide on Expired Tokens

If you are using the Facebook API and admission tokens for the simplest of reasons (for example using Facebook for validating the signup procedure in your application), make sure that it is not expired. Usually, Facebook tokens expire within 2 hours afterward they are requested from the Facebook server. You can check the official documentation on How-To: Handle expired access tokens past Facebook itself.

Remove offline access permissions in Awarding Development

Note: In some cases in the development surroundings, users have the Remove offline_access permission enabled. In some cases, this expires the token even if it is not expired. Make sure that y'all disable these options.

Y'all can as well try getting a permission for offline_access so you might become a token which will not elapse and crusade problems.

Kevin is a dynamic and self-motivated information technology professional, with a Thorough noesis of all facets pertaining to network infrastructure pattern, implementation and administration. Superior record of delivering simultaneous large-scale mission critical projects on fourth dimension and under budget.

hullandamust.blogspot.com

Source: https://appuals.com/fix-facebook-error-validating-access-token/

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