No build output from autoscaled runner

I would like to autoscale runner on amazon ec2. I configured runner using the following instruction: https://docs.gitlab.com/runner/install/autoscaling.html

It is able to start ec2 instance. But there is no build output on ‘Builds’ page. The only output is:
Running with gitlab-ci-multi-runner 1.8.1 (a2abdc7)
Build succeeded

What could be the problem?