Unable to access Gitlab in conjunction with Nginx fork

I’ve tried to install Omnibus Gitlab alongside Openresty (an Nginx fork, with extra features) using this guide on the docs, but it’s simply errored out (unable to get error, due to trying other methods).
Afterwards, I tried using both the normal and SSL configurations from the OSS version; I managed to get further (i.e. openresty started without problems) but Gitlab started acting up afterwards, giving me the Whoops, GitLab is taking too much time to respond. error.
I’ve attempted multiple fixes, including cleansing and reinstalling, but none have worked.
Any advice? Thanks. :+1: