thanks for your remarks!
unfortunately, this didn’t really resolve the issues. i noticed that there is already a pro/python/seafevents directory (so git refuses to overwrite). i don’t get any error messeges except Error:Seahub failed to start. Please try to run "./seahub.sh start" again – log/seahub.log doesn’t show anything. this makes it hard to debug 
does seafevents use the same database as seahub, as your example suggests? the config template in seafevents names the database seafevents.
@daniel.pan do you have any advice how to manually get this working using the supposedly outdated build script?