I've had that at various times, [although a lot more with Cubase than anything else].
Try right clicking on the monitor screen where the dialog box is, [if using more than one monitor that is], and change the screen resolution. You may need to try a few different settings but it should only take a minute or even less each time.
Take note of your current settings so that you can put it back to that when you're done.
As far as preventing that from happening again, that I don't know, but at least this may get you out of this particular jamb.
Let us know if that works for others' sake.
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