EAP-AKA' authentication method not working with Free5gc

[bienjouejo]

Hello everyone,

For my lab I am using free5gc core network with UERANSIM.
I asked for help in the free5gc forum and their conclusion was that it is comming from UERANSIM, here is the discussion on their forum :
https://forum.free5gc.org/t/authentication-method-eap-aka-not-working/2260

I am facing the following issue as soon as I change the authentication method (in the webconsole) of my subscriber from EAP-AKA to EAP-AKA-PRIME.

I saw the only configuration file related to it in the configuration files of free5gc : /config/ausfcfg.yaml and I tried both false and true parameters in case it would change something but I still have the error.

I made sure the configuration of the subscriber are the same between the one I created in the webconsole and the configuration file of the UERANSIM: free5gc-ue.yaml (didn’t find anything related to the authentication method in here)
Are there any other configuration file I need to modify ? or the error is comming from somewhere else ?
Maybe I need to add some lines in this same file or in the gnb configuraiton file to precise the authentication method to use?

Here is the error in wireshark in which we can see that the authentication method selected by the core-network (free5gc) is EAP-AKA’
so I suppose the issue might be in the UERANSIM configuration ?

If anyone knows or has already faced this issue, I could use some help.