Install of URBACKUP not working

I am trying to install urbackup on ubuntu 18.04 which I do not have alot of experience with. I use the commands:

  1. sudo add-apt-repository ppa:uroni/urbackup
  2. sudo apt update
  3. sudo apt install urbackup-server
    but the last command gives " E: The package unifi needs to be reinstalled but I can’t find an archive for it"
    I tried these three times but same results… definition of insanity.
    What to do now?

Unifi is a totally unrelated package, see UniFi - How to Install and Update via APT on Debian or Ubuntu.

The error message is unrelated to the urbackup-server install, it should come up on any use of apt install until you fix the unify package issue.