I have not tested against the Sandbox in about a week, but all my tests going against the Sandbox today have failed. I've tried previous payloads in my Postman history that have worked, but everything is returning a 500 Internal Server error.
The OAuth2 token is generated successfully and can be used to pull from the Sandbox using the iLAD Export. Below is the return body and header trace. Let me know if there is additional information I need to provide to get this solved. Thanks.
"title": "An error occurred, please try again later.",