I am trying to call [GET] /Self (Retrieves the member information for the current user. )

And receive a 401 status: 'Unauthorized' with the following information in response data:

'Invalid OAuth protected resource access request. OAuth authentication failed.'

I successfully verified my access_token with: [GET] /oauth/test_request (Checks if the access token is valid and working correctly without making unauthorized calls on behalf of the user.)

My question:

What is wrong when my token is valid  and [GET] Self fails with 'Invalid OAuth protected resource access request. OAuth authentication failed.'?

Both requests are done by the same initialized, with ContentType.ANY

Looking forward to any suggestions

Geb de Valk