EDIT: I just noticed you're running ESXi 5.5?
Thats ancient
If not might have to upgrade compatibility
I’m using ROS 7.16.x under ESXi 8.0.3, the latest version.
You should select "Other 4.x Linux" in the guest OS option just as it tells you to do
:foreach o in=$cpuarray do={:set arraytot ($arraytot + $o)};