I can't move the character

Instead of adding a third-person mode at the beginning of the project, I created a series of blueprints using a custom " pawn " class that I tied to the mouse.(在项目初期我没有添加第三人称模式,使用自定义的"pawn"类创建了一系列蓝图,我将移动,旋转,缩放都绑定在了鼠标上.)

Now that I’ve added third-person mode to the project, I find that my character can’t move. I try to change the game mode to third-person mode, but it fails.(现在,我将第三人称游戏模式加入到项目中,我发现我的角色无法移动,我尝试将游戏模式改为第三人称模式,但是它失败了.)

My character rotateS to face forWard When I preSS " W " and to face backWard When I preSS " S ". The mouSe Still controlS the rotation of the vieW, but my character cannot move.(我的角色在我按下"W"时旋转至面向前方,按下"S"时旋转至面向后方,鼠标依然可以控制视角的旋转,但是我的角色无法移动.)

I hope someone can help me, thank you very much.(感谢大爹伸出援手)