Error when run any pipline in gitlab-ci installed in kubernetes caster

I registered my cluster in gitlab and install by Gitlab Managed Apps gitlab runner. I tried run simple pypline

stages:
  - check_system

check:
  stage: check_system
  script:
    - uname -a

and got error ERROR: Job failed (system failure): Pod "runner-jcozbyhz-project-13915552-concurrent-0mtlx7" is invalid: [spec.containers[0].securityContext.privileged: Forbidden: disallowed by cluster policy, spec.containers[1].securityContext.privileged: Forbidden: disallowed by cluster policy]
What is wrong and how to fix it?

In case you are still looking for a solution.
The following as described here helped me to get the runner working in a microk8s cluster.