Error 500 on Recover GitLab CE after Server Rebuilt

Hi all
My Ubuntu OS drive died today. Luckily all Gitlab information was stored under a RAID drive that survived

On a new disc I installed ubuntu 20.04 + Gitlab 10.0.2 (original version) + PostgreSQL 9.5 (apparently the configuration is using an external DB - confirmed working )

I was able to rescue gitlab-secrets.json & gitlab.rb from the main disk.

Assumed I could only reinstall the same version, use the same files, and point to the same location as before.

Gitlab Starts, but as soon as I try to sign-in all I get is Error 500.

QUESTION: Were to look for the problem?
QUESTION2: Are there any log files that can Help?

Thanks in advance

My gitlab.rb only sets:

external_url ‘https://git.xxxxxx.com

gitlab_rails[‘gitlab_email_enabled’] = true
gitlab_rails[‘gitlab_email_from’] = ‘gitlab@xxxxxx.com’
gitlab_rails[‘gitlab_email_display_name’] = ‘GitLab’
gitlab_rails[‘gitlab_email_reply_to’] = ‘noreply@xxxxxx.com’

git_data_dirs({ “default” => { “path” => “/mnt/storage/gitlab/git-data” } })

gitlab_rails[‘db_adapter’] = “postgresql”
gitlab_rails[‘db_encoding’] = “unicode”
gitlab_rails[‘db_database’] = “gitlabhq_production”
gitlab_rails[‘db_username’] = “gitlab”
gitlab_rails[‘db_password’] = “xxxxxx”
gitlab_rails[‘db_host’] = ‘127.0.0.1’
gitlab_rails[‘db_port’] = 5432

gitlab_rails[‘smtp_enable’] = true
gitlab_rails[‘smtp_address’] = “mail.xxxxxx.com
gitlab_rails[‘smtp_port’] = 465
gitlab_rails[‘smtp_user_name’] = “integraton@xxxxxx.com
gitlab_rails[‘smtp_password’] = “$$$$$$$$”
gitlab_rails[‘smtp_domain’] = “xxxxxx.com
gitlab_rails[‘smtp_authentication’] = “login”
gitlab_rails[‘smtp_enable_starttls_auto’] = true
gitlab_rails[‘smtp_tls’] = false

gitlab_workhorse[‘auth_backend’] = “http://localhost:8088
unicorn[‘port’] = 8088

postgresql[‘enable’] = false
web_server[‘external_users’] = [‘www-data’]
nginx[‘enable’] = false