Buttons don't work with unity's new input system.

Unity Engine
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1

when I added button to my project(with new input system) it started throwing this error:

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.
UnityEngine.EventSystems.BaseInput.GetButtonDown (System.String buttonName) (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/InputModules/BaseInput.cs:126)
UnityEngine.EventSystems.StandaloneInputModule.ShouldActivateModule () (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/InputModules/StandaloneInputModule.cs:227)
UnityEngine.EventSystems.EventSystem.Update () (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/EventSystem.cs:474)

ikd how to fix

2

This is the 2D forum which has nothing to do with your post. So you know, the 2D forum isn’t for any feature problem you encounter when making a 2D game.

Here’s the ones related to your issue:
Input System
UI

You can find the available forums here.

EDIT: Moved to the Input System forum.

3

Simply click on the eventhandler in your hierarchy and there should be a button in the inspector to fix this.