attempt to perform arithmetic on global 'mult' (a nil value) when mult isn't nil

[RedrcknRbn]

I'm trying to create a joker, however, the game keeps crashing no matter what whenever i try to enter a round.
It works perfectly fine in the shop, however.
https://github.com/user-attachments/assets/10f4f8d8-2e21-4f17-8db7-8afecf2d2b2b

log.txt - Crashlog
main.lua - Joker Code

[Aurelius7309]

Read up on how calculate functions work in the wiki, your function doesn't have any context checks, so it tries to trigger outside of scoring. Also replace your selfs in these functions with card, self is just a joker prototype and not the actual card