I used helmod normally until I suddenly clicked on a previous production block and found that it could not be edited, and the following instructions appeared.

helmod/model/Player.lua:813: attempt to index local 'prototype' (a nil value)

I really like this mod. I hope this small problem can be fixed. Thank you.

probably a resource removed from the game, the block must be delete and rebluid

I don't know what the cause of the missing resource is. But I can stop it crashing. I'll have that fix in the next version.

I'm using beta edition of Pymods. Before this problem occurred, mods did have a small upgrade. （2022/09/06）This may be the cause of the problem.