Square API is returning the following error when I try to test a Square transaction in TI:
"category": "INVALID_REQUEST_ERROR",
"code": "VALUE_EMPTY",
"detail": "Field must not be blank",
"field": "source_id"
I have not tested using the Production values yet. Could it just be that OmniPay or PayRegister does not account for Sandbox testing? Thanks for reading.
edit: I believe I have found the answer: tastyigniter/ti-ext-payregister28