I am running into some trouble restarting Pega once the update has been run. I am running our instances on docker containers. There is a problem in the logs referencing Kafka and the stream service. I am able to get to the Pega login screen on my instance, but my login credentials are always rejected. Are there any suggestions or documentation that you could reference me to? I have been referring to the Pega 8.4 Upgrade Guide currently.