I have a Installation problem

When I want to install mail in a box on my ovhcloud vps
Here is saw this problem
How can I solved it

sudo: unable to resolve host box.edgetec.uk: Temporary failure in name resolution

photos 2.0.1 disabled

dashboard 7.5.0 disabled

activity 2.17.0 disabled

Installing Z-Push (Exchange/ActiveSync server)…

Installing Mail-in-a-Box system management daemon…

FAILED: /usr/local/lib/mailinabox/env/bin/pip install --upgrade pip

setup/functions.sh: line 19: /usr/local/lib/mailinabox/env/bin/pip: No such file or directory


Check this topic and make sure to start with a fresh vps before you perform the actions as described there.