I'm trying to install GitLab on ubuntu server 16.04 on Hyper V and it throws this error at me.
I tried to change the external url, but it keeps throwing me wrong. It is for internal use, it is not necessary that it can be accessed from outside.
In case it helps someone in the future.
I had everything well configured and it gave me error installation after installation, I managed to solve it by updating all the packages of my Ubuntu Server, even those that retains the system, which are the ones that were giving me error.