What is this grey square?

[Parallels User]

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[Maria@Parallels]

Hello, did you reinstall Parallels Tools and check the issue?

 

[Maria@Parallels]

When I'm running Windows 10 in Coherence, I have this box. It appeared recently and I have no idea how to get rid of it. It doesn't show up when I exit Coherence.

What is your Parallels Desktop version?

 

[Parallels User]

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[Parallels User]

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[Parallels User]

>>> Message has been deleted by the user <<<

 

[Parallels User]

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