Hello there,
I’m super new to Gitlab. I wish to find some help because i can’t figure out what’s the problem is.
I have an OVH VPS and i installed Gitlab on it ( Centos 8 )
Everything worked great until i tried to touch the SMTP setting for the mails.
What i did :
Changed the OVH mail settings and did $gitlab-ctl reconfigure
I have this message :
Running handlers:
There was an error running gitlab-ctl reconfigure:
letsencrypt_certificate[git.insaniam.com] (letsencrypt::http_authorization line 5) had an error: RuntimeError: acme_certificate[staging] (/opt/gitlab/embedded/cookbooks/cache/cookbooks/letsencrypt/resources/certificate.rb line 25) had an error: RuntimeError: ruby_block[create certificate for git.insaniam.com] (/opt/gitlab/embedded/cookbooks/cache/cookbooks/acme/resources/certificate.rb line 108) had an error: RuntimeError: [git.insaniam.com] Validation failed, unable to request certificate
the website broke completely backend no accessible from OVH
After that i tried to $gitlab-ctl reconfigure again and no error, but website still not avaliable.
I restaured from OVH, website came back.
I tried to run $gitlab-ctl reconfigure withtout any change, same big error :
Running handlers:
There was an error running gitlab-ctl reconfigure:
letsencrypt_certificate[git.insaniam.com] (letsencrypt::http_authorization line 5) had an error: RuntimeError: acme_certificate[staging] (/opt/gitlab/embedded/cookbooks/cache/cookbooks/letsencrypt/resources/certificate.rb line 25) had an error: RuntimeError: ruby_block[create certificate for git.insaniam.com] (/opt/gitlab/embedded/cookbooks/cache/cookbooks/acme/resources/certificate.rb line 108) had an error: RuntimeError: [git.insaniam.com] Validation failed, unable to request certificate
And no website avaliable.
Right know i’m stuck because if i can’t use $gitlab-ctl reconfigure, it’s going to be a big pb probably.
I understand that’s it look like a SSL certfificate validation problem but i don’t know how to fix that 
Also, how is that possible that it broke the website, it should just tell me that it’s not working, no ?