Good afternoon! When combining your mod and Krastorio 2, 5 errors were found in the logs.

Here is a list of these errors taken from factorio-current.log:

2.722 Script @deadlock-beltboxes-loaders/prototypes/shared.lua:13: DBL: Error: Can't create stacks for item that doesn't exist first-aid-kit
2.725 Script @deadlock-beltboxes-loaders/prototypes/shared.lua:13: DBL: Error: Can't create stacks for item that doesn't exist deuterium-oxide
2.725 Script @deadlock-beltboxes-loaders/prototypes/shared.lua:13: DBL: Error: Can't create stacks for item that doesn't exist imersite-glass
2.725 Script @deadlock-beltboxes-loaders/prototypes/shared.lua:13: DBL: Error: Can't create stacks for item that doesn't exist black-reinforced-plate
2.725 Script @deadlock-beltboxes-loaders/prototypes/shared.lua:13: DBL: Error: Can't create stacks for item that doesn't exist white-reinforced-plate

I don't know how critical these errors are, since the game loads without conflicts.

Thanks!

They're not critical. Most likely K2 is trying to stack items that no longer exist, or haven't been created yet.