Hi Martin,
I had the same journey, but it turned out this is not ODFE related, it has something to do with the breaking changes that comes with elasticsearch and kibana major release 7 → Breaking changes in 7.0 | Kibana Guide [7.0] | Elastic
in my case I had to check for following syntax changes in order to get Kibana started and reachable:
elasticsearch.hosts: https://localhost:9200
and
server.ssl.enabled: true
But I still have issues with the upgraded cluster as “admin” suddenly doesn’t have any write permissions and not seeing the indexes, so one more riddle to solve.
thanks,
nean