"No Data" metrics after migration to Opensearch

v8.4.5 (4cafe613e)

Want make them working correctly.

Checked all kinds of permitions of OpenSearch user? and it’s fine, but Grafana still getting “No Data” metrics


and also in grafana.log i see 400 code - Bad request

Previously, using ELK it worked fine
Here is what I got whan inspecting(editing) a graph ( Deployment Frequency):
An unexpected error happened

TypeError: Cannot read properties of undefined (reading ‘label’)
at vr (https://grafana-HOST.foo/public/plugins/grafana-opensearch-datasource/module.js:2:135321) at div at div at div at El (https://grafana-HOST.foo/public/build/9180.cd4ada1146b53ad3284f.js:2966:306) at div at Bl (https://grafana-