I installed a Ubuntu 18.04 and ZM 1.31.4 this weekend from scratch. So far it working without any issues. I have 7 of the POE Hikvision HD cameras - and one Foscam. Impressed so far though my setup is not very complicated. I don't do any of the "motion" detection inside of ZM - I depend on external triggers to turn the cams on. Thanks for the devs and their hard work on this product...
Romany