Is the Adobe Acrobat Sign service experiencing stability issues recently / today?

I'm using the API to request an Access Token. After having received a code from an Authorization Request I am now using postman to request a Beaer Token. I have configured my Post request in Postman in accordance with the api documentation and receive a 500 error when sending the request. Postman returns:

Sorry, we were not able to process your request.

Please try again later.

If this error persists, please contact support.