Let's Encrypt does not auto renew

Summary

I have enabled Let's Encrypt integration on Omnibus installation with GitLab version 11.3.4. And, I also setting auto renew. But it seem not works.

Steps to reproduce

It does not auto/manual renew the Let's Encrypt certificates until I deleted all SSL certifications in /etc/gitlab/ssl folder.

I tried run manual command for renew: sudo gitlab-ctl renew-le-certs but it not works

After that, I deleted all SSL certifications at /etc/gitlab/ssl and run above command again. It's works!

Results of GitLab environment info

Expand for output related to GitLab environment info

System information
System:
Current User:	git
Using RVM:	no
Ruby Version:	2.4.4p296
Gem Version:	2.7.6
Bundler Version:1.16.2
Rake Version:	12.3.1
Redis Version:	3.2.11
Git Version:	2.18.1
Sidekiq Version:5.1.3
Go Version:	unknown
GitLab information
Version:	11.3.4
Revision:	30f019d
Directory:	/opt/gitlab/embedded/service/gitlab-rails
DB Adapter:	postgresql
URL:		https://gitlab.xxxxx.com
HTTP Clone URL:	https://gitlab.xxxxx.com/some-group/some-project.git
SSH Clone URL:	git@gitlab.xxxxx.com:some-group/some-project.git
Using LDAP:	no
Using Omniauth:	yes
Omniauth Providers: google_oauth2
GitLab Shell
Version:	8.3.3
Repository storage paths:

• default: /mnt/git-data/repositories Hooks: /opt/gitlab/embedded/service/gitlab-shell/hooks Git: /opt/gitlab/embedded/bin/git

Results of GitLab application Check

Expand for output related to the GitLab application check

(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:check SANITIZE=true)
(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)
(we will only investigate if the tests are passing)

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)