From release of 0.18.28 up to now we have received ~100 crashes with this mod. There is one place where the lua "type" function is used as a key for an effects array. This will crash on load of existing saves and on fresh maps after save-load.

https://forums.factorio.com/viewtopic.php?p=495921#p495921

Fixing this crash on existing saves may require more effort because it has to run migration before

2020-05-27_Factorio_0.18.28.lua

from base game, since this reloads scripts, as part of reload it forces resaving of script data crashing when there were lua functions not removed from script data.