invalid_access_token

[Ivan_Gusev]

Hello,

We develop the tool which has an option to upload files to Dropbox. For the correct work with Dropbox, we use Dropbox.Api for .NET Framework version 4.7.0. One of our clients gets the following error message:

Dropbox.Api.AuthException: invalid_access_token/.
at Dropbox.Api.DropboxRequestHandler.<RequestJsonString>d__2f.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Dropbox.Api.DropboxRequestHandler.<RequestJsonStringWithRetry>d__1a.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Dropbox.Api.DropboxRequestHandler.<Dropbox.Api.Stone.ITransport.SendRpcRequestAsync>d__5`3.MoveNext()
--- End of inner exception stack trace ---
at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
at SqlBak.Destination.Dropbox.Impl.DropboxConnection.DoOpenConnection()
---> (Inner Exception #0) Dropbox.Api.AuthException: invalid_access_token/.
at Dropbox.Api.DropboxRequestHandler.<RequestJsonString>d__2f.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Dropbox.Api.DropboxRequestHandler.<RequestJsonStringWithRetry>d__1a.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Dropbox.Api.DropboxRequestHandler.<Dropbox.Api.Stone.ITransport.SendRpcRequestAsync>d__5`3.MoveNext(); Request Id: 46213a402ce103c26a5a632bb88d9e04<---

The reauthorization to Dropbox doesn't help.

We have many clients and they send files to their Dropbox accounts without any issues. Could you please check the Request Id what is going on with this token?

Request id: 

46213a402ce103c26a5a632bb88d9e04

If you need additional information, please let us know.

[Greg-DB]

I'm afraid I can't offer more information than what's documented for that error in this case. An 'invalid_access_token' error means that the access token used to make the API call isn't valid, e.g., it wasn't a valid access token, was revoked by the app or user, the app folder (if using that permission) was deleted, or the user account was deleted, etc.

Having the user re-authorize the app if they want to keep using it is the right solution. That would give a new access token to the app. Can you double check that the app is using the new access token, and isn't accidentally holding on to the old one, and isn't somehow changing the access token itself?

If that doesn't seem to be the problem, please open a ticket with the relevant app name, account ID, and steps to reproduce the problem so we can look into it: 

https://www.dropbox.com/developers/contact