We are running
OPA Version - opa:0.51.0-rootless
KubeMgmt -version kube-mgmt:8.2.0

The OPA pod restarted itself, and in the logs we see {"code":"undefined_document","message":"document missing: data.system.main"}, which then leads to the following error in our cluster

Internal error occurred: failed calling webhook "validating-webhook.openpolicyagent.org": failed to call webhook: the server could not find the requested resource

Once we delete the actually pod itself, then everything works as normal.

We believed that this was the fix to the this problem happening, #210 but we still encounter this issue.