If you are trying to play a supported game (like RPG Maker or Ren'Py), follow these steps to ensure you are using verified files: How To Install and Set Up Joiplay For RPGXP games
Assuming you have downloaded the verified plugin from the official Patreon or GitHub, follow these steps exactly. unity plugin for joiplay verified
JoiPlay updates frequently. A plugin that worked with JoiPlay v1.20.032 might crash with v1.20.400. The "Verified" plugin is always the one tested against the latest stable JoiPlay release. If you are trying to play a supported