Just as a heads up, it looks like the Nuclear Stack Inserter is messing with the "More Long Inserters" (kry-inserters) mod with an odd interaction:

[[ Failed to load mods: Error while running setup for entity prototype "long-stack-inserter" (inserter): next_upgrade target (nuclear_stack_inserter) must have the same fast_replaceable_group (inserter != long-inserter). ]]

Not saying it's anything on your end, I don't have the modding knowledge for that, but it does exist.

Thanks for reporting that.
You should also report this problem to the "Kryzeth" himself.
As for now, the issue has been resolved by making "bulk/stack" inserters not so easily upgradable with the upgrade planner in a single click (you need to use the upgrade planner menu).

Now 'fixed' in version 1.4.1