No, you installed the SailfishOS:Chum Installer from OpenRepos by the help of Storeman.
The SailfishOS:Chum Installer fails, because the SailfishOS:Chum community repository is not ready for SailfishOS 5.0 yet, as you can see in its log-file (RTFM) and its systemd-journal entries.
… I tried also to install just the rpm from github, but same result …
If you pick the right one, that should work.
Can youmaybe help me?