When using the new InputSystem. If I add a Canvas component to my Scene it brings automatically the old EventSystem and I see this error in my console:
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.Input.get_mousePosition () (at <213e6bf8f2dd495fbd693e6ce506136b>:0) UnityEngine.UI.MultipleDisplayUtilities.GetMousePositionRelativeToMainDisplayResolution () (at /Applications/Unity/Hub/Editor/2020.1.14f1/) UnityEngine.EventSystems.BaseInput.get_mousePosition () (at /Applications/Unity/Hub/Editor/2020.1.14f1/) UnityEngine.EventSystems.StandaloneInputModule.UpdateModule () (at /Applications/Unity/Hub/Editor/2020.1.14f1/) UnityEngine.EventSystems.EventSystem.TickModules () (at /Applications/Unity/Hub/Editor/2020.1.14f1/) UnityEngine.EventSystems.EventSystem.Update () (at /Applications/Unity/Hub/Editor/2020.1.14f1/) 3 Answers
Looks like the solution was in an automatic update button in the Inspector:
You probably tried to import a new input system package for multiple input devices compatibility. These type of errors are due to conflict between old and new input system packages and are probably resolved in latest updates. To resolve this issue, Go to Edit -> Project Settings->Player->Under Other Settings under Configuration is the option Active Input Handling. Select Both. Unity will restart. Now your problem should be solved. You will be able to use old input system packages and the new ones also simultaneously. Cheers. P.S
Click on this image link to view where these settings are in Unity editor.
0go to edit -> Player -> Other settings -> Configuration last option -> You can select the input system and then unity will restart then it should not throw an error :)
