Continually getting errors trying to install Helm Tiller via Gitlab UI

I'm getting the following error while trying to install Helm Tiller via GitLab's UI in my cluster. If I use a cluster created by GitLab, I don't have this issue. I just can't figure out what's different about my cluster. The nodes can reach this server/IP. Pods I'm spinning up for debugging purposes can access it as well. Any ideas?

Error: Looks like "https://kubernetes-charts.storage.googleapis.com" is not a valid chart repository or cannot be reached: Get https://kubernetes-charts.storage.googleapis.com/index.yaml: dial tcp 74.125.141.128:443: connect: connection refused