UI explorer don't work when I click ' indicate on screen ' in some UI automation activities

Hello everyone,
I met a trouble problem. One of my projects can’t indicate on screen after my UIpath updated to 2021.4.
When I clicked ’ indicate on screen ’ ,the screen blinked with nothing happened. I tried many activities in this project such as ‘attach window’,’ type into’ , ‘send hotkey’, and none of them worked. And UI explorer of this project didn’t work too
I tried two other projects, their UI automaiton activities and UI explorer can indicate on screen.
Does anyone know how to solve it , Thanks!

After reinstalled UIpath twice , the ui explorer can work