When lsdobserve is installed, it installs deployments named lsdobserve-{{numbers]]-component.
Given the following
k get cm lsdobserve-1612530851-grafana -o yaml | grep http
url: http://lsdobserve-prometheus-server
It can be seen that the Grafana configmap points to a prometheus service, which is missing its "numbers".
It should have been
url: http://lsdobserve-1612530851-prometheus-server