My previews with alt + tab

1

My alt + tab views keep giving the same error as the transparent gray square

2

meaning? clarify please

3

Is this the problem:

4

I did what this topic recomends, I’m just waiting of this error is if to be continued

5

I still dont know what youre talking about. Please post a screenshot

6

when happen the same error, I’ll take the print. But the error is the same of this topic I mencionnated, instead of showing the open windows, it shows that same square