Hi, althought I have not been able to reproduce the crash, I think that the problem, as highlighted by @bjokax, is the not correct handling of HTTP/2 multiplexing. The module was written before HTTP/2 was out so it has never been considered. Support for it would require some important refactoring of the module, I'll start seeing if I can work on it for the next major release. Meanwhile we can disable multiplexing at all (this can also be backported to current stable branches while a refactor to support multiplexing wouldn't). I've pushed such fix in this branch https://github.com/kamailio/kamailio/tree/grumvalski/disable_http2_multiplex.... @amessina @bjokax : can you try it? Since I've not been able for now to reproduce the crash I don't know if it solves yours. Thank you.