I have opendistro 1.8 and Elasticsearch/kibana is configured to use openid/Azure AD for authentication. It is working well.
I have performed the upgrade to 1.10.1. Cluster is green but kibana authentication is failing:
{"statusCode":400,"error":"Bad Request","message":"[request query.session_state]: definition for this key is missing"}
Did something change in 1.10.1 and was not documented in the upgrade steps?