问题描述：

我在运行steam VR的Interaction_Example时报错，其中unity为2021.3.6f1c1，steam VR(2.7.3)，头显为HTC Vive pro2。报错具体内容如下：

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 <024c5946c54a415f97bc93dfc0e47497>:0)

问题解决：

点击Edit->Project Settings...->Player->Other settings，将active lnput handling选项设置为Both。即可解决问题。