Same error here:
Request: api/SimulateAttacks/CreatePhishingCampaign
Status code: 500
Exception: System.Net.Http.HttpRequestException
Exception message: SecureScore API failed. ResultCode: InternalServerError
I kind of assume by all the comments that it's a general issue, I created a new tenant and configured it with following all the steps regarding the attack simulation page, but no result. I'm going to keep on trying for any new developments.
Note (13/06/2018): I tried again the functionality and IT WORKS!! I've tried both default templates successfully.
Request: api/SimulateAttacks/CreatePhishingCampaign Status code: 500 Exception: System.Net.Http.HttpRequestException Exception message: SecureScore API failed. ResultCode: InternalServerError
Request: api/SimulateAttacks/CreatePhishingCampaign Status code: 500 Exception: System.Net.Http.HttpRequestException Exception message: SecureScore API failed. ResultCode: InternalServerError