I don't know what conversion causes it but it bothers me so much https://paste.dimdev.org/putakegike.mccrash

I got another crash, i disabled flux networks to remove all items from the world and then added it back. But upon placing a flux point next to a ME Controller i was greeted with this

Edit: It seems that it's not the existence of the blocks that causes it, but rather opening the GUI and clicking on "Please select a network"

Nvm, it was because of 'world/data/sonar.flux.networks.configurations.dat'..... deleting the data fail fixed everything.