Hi,
first, I am sorry, I still did not get to start my SE+K2 game due to being drowned in work (staffing and onboarding).
Due to that I am experimenting with Nullius on a friends factorio server.
I made him install PUMP as well. When I tried to use it, it crashed the server. I'm afraid I don't have any logs, no admin access to the server and no time for a proper reproduction test and documentation locally.
Still thought this might be of interest to you. Either way, I expect my workload to go down soon :tm:, so maybe I can provide more information on the crash in a while.
Cheers
Meri