i tried to copy the code from the wiki to make a custom item for my pack, but it keeps giving this error. [23:31:01] [ERR ] Error occurred while handling event 'item.registry': Wrapped java.lang.NullPointerException: Cannot invoke "dev.latvian.mods.rhino.SharedContextData.getExtraProperty(String)" because "cx.sharedContextData" is null (startup_scripts:script.js#6)
included is a screenshot of my code