Hi @wmfairuz and welcome to the forum. Thanks for the info and prompt response.
You mention that you’re using Ubuntu 14.04, which reached end of life as of April 2019. This means it will no longer receive security and maintenance updates.
In response, GitLab stopped building and releasing packages for Ubuntu 14.04 with version 11.10.4
Merge Request: https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests/3192
I recommend either upgrading or migrating to a newer, currently supported OS like Ubuntu 16.04 to continue receiving GitLab and OS-level updates.
If you have any questions or issues updating, please don’t hesitate to reach out
All the best,