Exporting invalid json crashed the dashboard, now it’s not opening. I was trying to import node_exporter grafana json as an experiment (https://grafana.com/grafana/dashboards/1860-node-exporter-full/)

I guess you might have to manually delete the malformed dashboard json. However, the whole page shouldn't crash ideally. Get the id of the invalid json and delete it from the sqlite stored along with SigNoz installation

This was due to wrong JSON with some null values was pass while creating the dashboard. You can track this PR: https://github.com/SigNoz/signoz/pull/4421 Will be releasing soon.

What should I do for now?

It will be releasing soon.