"TypeError: undefined is not a function"

[clemet]

Title says it all. https://media.discordapp.net/attachments/414453383789805579/414460433727094784/unknown.png

 

[Kes]

Could you provide a link to the script that is mentioned in the error message.
Does this happen if you start a new game, rather than using an already existing save file?

 

[Shaz]

This kind of error is common when you add a plugin then resume a game you had started & saved prior to adding the plugin.

Although ... is this when you Play Test, or are you doing a Battle Test from the troops tab? A lot of plugins don't work in battle test or event test - only when you actually play the game properly.