Parallels Client throws error "Attempted an unsupported operation" after upgrade to 18.0.22341

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Issue

After upgrade to 18.0.22341 Parallels Client throws error Attempted an unsupported operation:

Cause

That's a known issue in Parallels Client, the Engineering team is working on the fix.

Resolution

As a workaround, please change the Connection banner style to Splash Window in Tools Options General and press OK:

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