GitLab Runner keeps "installing" to Kubernetes

I added a AKS cluster to my project and successfully used the UI to install Tiller, Ingres and Prometheus. However, after I clicked Install got the GitLab Runner, it keeps saying “installing” and showing the spinner for the last two hours. I checked the cluster and it seems to be fine, no failed deployments or pods.

Is there a timeout? I realise that checking the logs for instance would be problematic.