Elasticsearch bad gateway

Hey,
i create an elasticsearch data source and it was successful but when i refresh my dashboard i get this:

what should i do?

thanks

Are you using a preconfigured dashboard? If so, you might need to check that the queries work. It is not uncommon for imported dashboards to break

no, i’m using my own queries… i believe that my elastic server is not powerful enough, is it possible?

are you seeing any errors in the grafana logs? Have you tried increasing the verbosity to debug?