REST ECO calls hung up on sending request

Epicor ERP 10
1

I’m trying to use REST with Postman to create a method of manufacture with the EngWorkBenchSvc. I’m able to create the MOM in one of our environments using these steps:

  1. CheckOut
  2. ECOMtls
  3. ECOOprs
  4. ApproveAndCheckInAll

In another environment, the CheckOut method is successful, but the other steps hang up on “sending request.” Postman doesn’t give me an error, and we couldn’t find any errors in the server logs. The request just hangs up until it times out. Has anyone encountered a similar issue? Does anyone have an idea what would cause the REST calls to work in one environment and not another?