Hi @miconda,
I cloned Kamailio Master( 5.8 or?), it comes with the module already, then I put it inside the docker setup from this [repo](https://github.com/herlesupreeth/docker_open5gs) the plan is to try to build basic N5 Connectivity between P-CSCF and PCF see [Here](https://github.com/herlesupreeth/docker_open5gs/discussions/333), the main use in my setup is currently, to answer the SCP, as the P-CSCF sent a NotifyURI, after the user detaches in my setup the SCP is sending to the URI a request with PATH /terminate, this could be lead to more logic, but it still very experimental, as I am missing traces to see N5 traffic in real Network.
I had the issue above, it its related to this part of the code "ksr_nghttp2_reply_header_clear", I then removed the added code from commit mentioned above [(here)](https://github.com/kamailio/kamailio/commit/671b874a31fb10c6c9e9a246358928f2...) and the module works now, looks like there is issue here with the use of free() function here.
Best Regards