Erik, I never install Core Helper via sudo, and generally we should avoid to do this for security reasons.
I would recommend you uninstall Core Helper then install it as a non-privileged user.
As the conclusion in this topic:
The problem is very like caused by the owner of
~/Library/LaunchAgentswas changed torootaccidentally.
Some app may change the owner of ~/Library/LaunchAgents to root, a safer solution is change it back to the current login user.
Yang