We have a developer account with a sandbox API. We have an integration already working, it has no issues when using the default "acme sock" merchant account. We added a test merchant account, but the tokenization request is not working, it always throws the error "invalid.tatoken".
Here's a sample request:
We also tried using the test transarmor value we set for that merchant account at demo.globalgatewaye4.firstdata.com, but the ta_token is always invalid.
Here's the strangest part: we were using another developer account before this one, only on staging, and that account didn't have any issues when adding additional merchant accounts.
Thanks for any help.