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Playtest Error Undefined is not a function

BMM Archive · July 15, 2026

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Preserved forum archive. This topic stores the original first post and locally mirrored RPG Maker Web attachments when available. It is posted by the BMMPlay archive account, not by the original creator.

Original Source

Original title: Playtest Error Undefined is not a function
Original author: tapoutm
Original date: September 9, 2016
Source thread: https://forums.rpgmakerweb.com/threads/playtest-error-undefined-is-not-a-function.68071/
Source forum path: Game Development Engines > RPG Maker Javascript Plugins > Javascript/Plugin Support

Summary

Every time I try to test my game I get a black screen and the error: "Uncaught Typeerror: Undefined is not a function" and I attached the error log from the console as well as the list of plug-ins I am using. i did try to turn off the plugins and test then and it gave me the same result. Can someone help me resolve this? Any help is greatly appreciated thank you. View attachment game errors.docx View attachment plugin list.docx

Archived First Post

Every time I try to test my game I get a black screen and the error: "Uncaught Typeerror: Undefined is not a function" and I attached the error log from the console as well as the list of plug-ins I am using. i did try to turn off the plugins and test then and it gave me the same result. Can someone help me resolve this? Any help is greatly appreciated thank you.

View attachment game errors.docx

View attachment plugin list.docx

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