This same issue affected me as well. My original installation was far before 1.17 so there is undoubtedly much old cruft in my LocalSettings file that has accumulated. I would love to start with a clean, modern LocalSettings file and re-configure it but one of those is not provided in the Git repo or anywhere else I can find. I think there should probably be a clean, current LocalSettings file available somewhere that we can use as a template to start over again. Also, there probably needs to be more detailed upgrade instructions related to changes to LocalSettings.