Cause: The plugin cannot read the settings.dat file.
Fix: Go to Android Settings → Apps → JoiPlay → Permissions → Grant "All Files Access" (Android 11+). Also, move the game out of /Android/data/ to /Documents/Games/.
Unity games will make your phone hot. Use a cooler or play in short bursts. If the plugin crashes after 20 minutes, your CPU is throttling. Lower the resolution in JoiPlay's game-specific settings to 854x480. unity plugin for joiplay
In some cases, JoiPlay will prompt you to download or select a specific "Runtime Data" file for Unity. This usually happens if the app detects a game structure it doesn't natively recognize. If prompted, allow JoiPlay to download the necessary files. These files essentially act as the "plugin" or engine replacement for the PC files. Cause: The plugin cannot read the settings