And ignore the previous comment, that was a curse of having repeat messages in the code in different points.
The error is obvious and easy to fix/workaround, but it seems that the system is starting a service for which we can't get the service reference for... Which might lead to all kinds of fun as not being able to restart anything, etc...
Not sure why that would happen - I'll workaround the crash, but the plugin likely wouldn't work once that situation arises, as there wouldn't be any service memorized to later restart (I'll try to workaround that, too, but I'm not sure how effective that will be).
I'll put out version "u" in a bit, please test and collect some plugin debug logs if things don't seem to work (fingers crossed there won't be any crashes this time).