OAuth Token from extension response keys are genrrtaing 401 error

I have referred to the following link for development.

I have received the API key and API secret from the extension installation response but I am unable to generate the access token using them, but if I create an access key manually that key is generating the O Auth is there some step I am missing or settings I might have changed, because this use to work before. But now I am getting the following error.

OAuth Generation Error

Received Client Id and Client Secret using Extension install response.

But these using these credentials I am not able to generate the OAuth token.

API response :
{
„errors“: [
{
„code“: „4“,
„status“: „401“,
„title“: „Client authentication failed“,
„detail“: null
}
]
}

1 „Gefällt mir“

Having the same problem since the update from 6.4 to 6.5

You found a solution?