AirVantage: Context is not Valid for the User


So I’m trying to register a device to AirVantage, and I copied the ICCID, IMEI, and FSN exactly, however I keep getting the error “context is not valid for the user” and I think they’re more related to the IMEI and FSN, but nothing seems to be posted here other than this: Unable to register mangOH red with WP8548 on Airvantage

It’s seems to be the same error but it was never solved. Has anyone else run into this?