InvalidOperationException: You are trying to read Input using the UnityEngine.Input class, but you have switched active Input handling to Input System package in Player Settings
Means what it says. You’re calling the old input class when in your Projecting Settings → Player → Other Settings → Configuration → Active Input Handling (wow that was rather long), you have selected Unity’s new input system.
Unity will throw an error when you call the old system while only having the new system active.
Either set your Active Input Handling to both, or change it back to the old system.
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