This weird icon appeared on all the corners of the windows

Unfake_engine · 2023-08-10T15:15:27.022Z

this weird icon just appeared on all the corners of a window a long time ago and I have been trying to remove it can someone pls help.

Unfake_engine · 2023-08-10T19:39:49.173Z

I have asked chatgpt but it does not understand and it appears on the windows like the hierarchy