I had the same error message a week ago. Axxess responded to my query after 3 days! They advised deleting the profile and then recreating the profile again. I did this and nothing changed. Then suddenly started working again after a few days.
I can empathise with those who have been been dealing with Axxess. Last month I decided to try Axxess and took MTN Fixed LTE with them. SIM was provisioned quite quickly surprisingly and worked well for 2 weeks. Then suddenly stops working with a "Profile invalid" error. Then starts the...