Problem with the mouse not moving in Inspect System

Hello, everyone

I watched a tutorial about object inspection in UE4 on youtube
https://www.youtube.com/watch?v=jLtgzfCRYwk&ab_channel=ThePolygonPilgrimage
I used UE5 to follow suit, and found that my mouse could not rotate at the beginning of the game
Inspecting the blueprint doesn’t seem to make a difference

I want to know what is wrong, thanks