URP Setup Guide for Unity Beginners

Fixes – 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

✅ If you encounter these errors in Unity 6 or later, please follow these steps:

The error mainly occurs in Unity 6 or later due to the New Input System pre-installed when you create a new project in these versions.

✅ Solution 1:

The Quick Fix: Enable Both Input Systems

The simplest and often most practical solution, especially when working with mixed assets, is to tell Unity to support **both** the new Input System and the old Input Manager simultaneously. Here’s how:

Navigate to **Edit > Project Settings** in the Unity editor.
In the Project Settings window, select the **Player** category from the left-hand menu.
Scroll down to the **Other Settings** section, and then locate **Configuration**.
Find the dropdown menu for **Active Input Handling**. Change its value from `Input System Package (New)` to **Both**.

Unity Project Settings Active Input Handling set to Both

Changing “Active Input Handling” to “Both” in Project Settings.

Unity will then prompt you to restart the editor. Click **Apply** or **Restart** (depending on your Unity version) to apply the changes and relaunch Unity.

Why This Works

By setting “Active Input Handling” to “Both,” you inform Unity that it should allow scripts to interact with input using either the `UnityEngine.Input` class (old system) or the classes provided by the new Input System package. This resolves the `InvalidOperationException` by removing the conflict.

✅ Solution 2 (for old version of JRS Vehicle Physics Controller):

Go to Window and click on Package Manager

Under Unity Registry search for Input System and click on Remove

After removing the pre-installed Input System click on Restart the Editor , the error will disappear, and Unity will read the input using the UnityEngine.Input class.