Flask Authlib token revocation endpoint returns "invalid_client" error

Question

I'm trying to implement token revocation endpoint using Flask and Authlib, however it returns an error

{
    "error": "invalid_client"
}

The controller itself

@app.route('/revoke', methods=['POST'])
@require_oauth()
def revoke_token():
    revocation_response = server.create_endpoint_response(
        AccessTokenRevocationEndpoint.ENDPOINT_NAME, request)

    return revocation_response