HABmin installation failed


I tried to install HABmin via Paper UI on my Raspberry. But installation was not successful. The “waiting symbol” wouldn’t stop turning. Additionally i get the following error message every 30 seconds in my Log file:

2019-04-30 23:11:46.966 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed installing 'openhab-ui-habmin': Unable to resolve root: missing requirement [root] osgi.identity; osgi.identity=openhab-ui-habmin; type=karaf.feature; version="[2.5.0.SNAPSHOT,2.5.0.SNAPSHOT]"; filter:="(&(osgi.identity=openhab-ui-habmin)(type=karaf.feature)(version>=2.5.0.SNAPSHOT)(version<=2.5.0.SNAPSHOT))" [caused by: Unable to resolve openhab-ui-habmin/2.5.0.SNAPSHOT: missing requirement [openhab-ui-habmin/2.5.0.SNAPSHOT] osgi.identity; osgi.identity=pom; type=osgi.bundle; version="[,]"; resolution:=mandatory [caused by: Unable to resolve pom/ missing requirement [pom/] osgi.wiring.package; filter:="(&(osgi.wiring.package=com.thoughtworks.xstream)(version>=1.4.0)(!(version>=2.0.0)))"]]

Even a reboot doesn’t stop those messages. How can I stop that installation process?

EDIT: I updated to the latest snapshot version. Installation process stopped now. But I had to restart mosquitto, because after the update my broker did not start.