Grafana is not showing data in the dashboard

Grafana Version: helm.sh/chart=grafana-6.29.2
OS: Ubuntu 20.04.3 LTS (k8s node)

I am trying to get the graphs in my dashboard. The dashboard is deployed via configmap with the “grafana_dashboard=1” label. Graphs are rendered in the cluster where I deployed Grafana manually without helm chart, but does not work in cluster where I deployed Grafana using kube-prometheus-stack. When I restart the Grafana deployment, configmaps are not updated as well.

What could be the issue? I tried to update queries manually, and then graphs appeared. Of course it is not the solution for the problem, as I need to pass the dashboard to different users.

In Grafana logs I have the issue:
01T07:39:04.09+0000 lvl=eror msg=“Failed to look up user based on cookie” error=“user token not found”