Thank you @miconda, super quick! Indeed I did not understand from where were being extracted all KSR.kx. functions. Fixed by adding `kemix` in `included_modules` before installing, and `loadmodule "kemix.so"` into the config.
We might add clarification on [KEMI docs](https://kamailio.org/docs/tutorials/devel/kamailio-kemi-framework/modules/#k...) in order to avoid brain conflicts between KEMI, kemix, kex, and kx terms. We do you think? I'd be happy to add it if lgtm.
Thanks again, closing.