I get the following set of errors repeated in my openHAB log.
2020-12-29 21:28:29.768 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed installing 'openhab-package-expert': No matching features for openhab-package-expert/0
2020-12-29 21:28:29.771 [WARN ] [core.karaf.internal.FeatureInstaller] - The ui add-on 'dashboard' does not exist - ignoring it.
2020-12-29 21:28:29.772 [WARN ] [core.karaf.internal.FeatureInstaller] - The ui add-on 'homebuilder' does not exist - ignoring it.
2020-12-29 21:28:29.772 [WARN ] [core.karaf.internal.FeatureInstaller] - The ui add-on 'habmin' does not exist - ignoring it.
2020-12-29 21:28:29.772 [WARN ] [core.karaf.internal.FeatureInstaller] - The ui add-on 'paper' does not exist - ignoring it.
\\OPENHABIAN\openHAB-userdata\config\org\openhab\addons.config
or /var/lib/openhab/config/org/openhab/addons.config
they’re no longer in OH3 - you need to delete them
2020-12-29 21:28:29.771 [WARN ] [core.karaf.internal.FeatureInstaller] - The ui add-on 'dashboard' does not exist - ignoring it.
2020-12-29 21:28:29.772 [WARN ] [core.karaf.internal.FeatureInstaller] - The ui add-on 'homebuilder' does not exist - ignoring it.
2020-12-29 21:28:29.772 [WARN ] [core.karaf.internal.FeatureInstaller] - The ui add-on 'habmin' does not exist - ignoring it.
2020-12-29 21:28:29.772 [WARN ] [core.karaf.internal.FeatureInstaller] - The ui add-on 'paper' does not exist - ignoring it.