Error installing gitlab-ee on Ubuntu 18.04

I’m getting this error when installing on Ubuntu 18.04
---------------------------------------------------
Running handlers:
There was an error running gitlab-ctl reconfigure:

execute[/opt/gitlab/embedded/service/gitlab-shell/bin/gitlab-keys check-permissions] (gitlab::gitlab-shell line 97) had
an error: Mixlib::ShellOut::ShellCommandFailed: Expected process to exit with [0], but received '1’
---- Begin output of /opt/gitlab/embedded/service/gitlab-shell/bin/gitlab-keys check-permissions ----
STDOUT: error: could not open /var/opt/gitlab/.ssh/authorized_keys: Permission denied @ rb_sysopen - /var/opt/gitlab/.ss
h/authorized_keys
-rw------- 1 root root 0 May 11 18:20 /var/opt/gitlab/.ssh/authorized_keys
STDERR:
---- End output of /opt/gitlab/embedded/service/gitlab-shell/bin/gitlab-keys check-permissions ----
Ran /opt/gitlab/embedded/service/gitlab-shell/bin/gitlab-keys check-permissions returned 1
--------------------------------------------------------------------
Can anyone help please?