Sidekiq error: undefined method `flatten'

Summary

Gitlab helm chart error: undefined method `flatten'

Steps to reproduce

I'm trying to deploy gitlab helm chart via ArgoCD. The values I'm using are in https://github.com/2Fast2BCn/gitlab/blob/main/gitlab.yaml

I setup istio for ingress.

In pod gitlab-sidekiq-all-in-'-v2-* I'm getting error:

/var/opt/gitlab/templates/gitlab.yml.erb:181:in '<main>': undefined method 'flatten' for #<String:0x00007f04314581c0> (NoMethodError)

I'm not sure where to fix this error.

Configuration used

https://github.com/2Fast2BCn/gitlab/blob/main/gitlab.yaml

Current behavior

ArgoCD deploy fails

Versions

• Chart: 5.5.2
• Platform:
  • Self-hosted: Bare metal
• Kubernetes: v1.22.4
• Helm: v3.7.1

Relevant logs

/var/opt/gitlab/templates/gitlab.yml.erb:181:in '<main>': undefined method 'flatten' for #<String:0x00007f04314581c0> (NoMethodError)