Actually, @tstav the problem lies in /etc/asterisk/vitalpbx/features__10-application-map.conf
You need to do what is outlined in this post:
What is happening is, that VitalPBX dev team did not comment out the two custom_blindxafer and the custom_atxfer in the custom features group. But since Asterisk cannot find a application map for these, it cannot reload the features module.