This is most likely because the mod is outdated, I pushed a couple of updates to regular Dicey Wastelands after taking over which caused a couple conflicts with my prior mods, I might eventually update my old DW addons, but I doubt that's gonna be the case.
If I had to guess, the reason why loading the addon externally to DW works, is because it might be overriding some of the original mod's behavior, which is what also causes the errors to appear.
For now, assuming your current setup has issues, I'd recommend you go back to the last update posted by MysticSword (instead of mine) on DW if you wanna use my addons.











Same error as with the Fly instant death:
I was having one of my best runs ever with eyes, and I proceeded to fight the final enemy of the level (A level 4 fly) with full hp, I broke 1 of his dice and burnt the other (don't know if this had anything to do with it), then the fly used his third card (didn't get to read what it was) and basically used it like 20 times due to an error and instant killed me.
I was unable to flee or do anything afterward, I had to exit the game and basically lose all of my progress.