I have the same issue.
I tried to copy a belt segment with inserters. which produced the crash. Am not sure if thats reproduceable, but anyway, heres the log + save in case its helpful:

I still can edit existing map markers, but I cant create new ones.

Hello, thank you for taking the time to post the bug report, however this is intentional due to complicated graphics of pump connector, it won't connect to fluid wagons unless they are aligned to particular position and train stopped on curve doesn't have correct alignment. Yes I was aware of the f...

Please take a look at the picture below