Good Afternoon - 

I have a sandbox account and am creating integration between an ERP system and Cybersource - I can Authorize / Capture Credit Cards without issue - However, I' munable to create an InstrumentIdentifier + Payment Instrument to use later (IE - Using these to Authorize a payment vs hand keyed Credit Card information) :

Error calling PostInstrumentIdentifier: {"errors":[{"type":"invalidHeaders","message":"Invalid header values","details":[{"name":"profile-id"}]}]}

I do not know what's invalid about the Profile ID I have (I don't know what the profile id actually is and can't find anything in the documentation related to it) - i get a similar (but different wording) error when using the "Live" console on the API reference website. 

{
"errors": [
{
"type": "missingHeaders",
"message": "Missing header values",
"details": [
{
"name": "profile-id"
}
]
}
]
}

Any help would be greatly appreciated