i-mscp 1.5.3 (build 2018120800) Release, Ubuntu 18.04 LTS. It does'nt mater what version of php I choose at setup, I get thesame error during instalation. Any suggestions? Thanks!
PS: I found a post about this issue, but not the solution. I also tried "apt-get install php7.1-apc", but it did'nt fix it.