API references "Try it" for School does not return data (500 Error)

I am unable to get data to return on any endpoints for School. The Authorization is fine but Send just returns an error. Even for endpoints that do not require a parameter, like Level list.

Trying to hit data in https://30373.myschooldemo.com/ (particularly Employment (Single user) id 3294447)

Response status

500 Internal Server Error

Response latency

321 ms

Response content

Transfer-Encoding: chunked<br/>Strict-Transport-Security: max-age=86400<br/>X-Content-Type-Options: nosniff<br/>Date: Mon, 15 Jun 2020 19:18:00 GMT<br/>Content-Type: application/json<br/>
An error has occurred.