Adding an issuer with a URL and one-time code fails with the following error message:

The issuer URLs and one-time codes are valid because after they failed I tried adding the issuers on the Android wallet app and they worked just fine.
Looking at the logs, I see that the Android wallet makes a GET request to the issuer URL, gets the "introductionURL" from the response, and then makes a POST request to the "introductionURL".
The iOS wallet app only makes the GET request. It does not follow up with a POST request to the "introductionURL".
Adding an issuer with a URL and one-time code fails with the following error message:
The issuer URLs and one-time codes are valid because after they failed I tried adding the issuers on the Android wallet app and they worked just fine.
Looking at the logs, I see that the Android wallet makes a GET request to the issuer URL, gets the "introductionURL" from the response, and then makes a POST request to the "introductionURL".
The iOS wallet app only makes the GET request. It does not follow up with a POST request to the "introductionURL".