I dragged (“tore-off”) the Search panel and this happened:
I can reproduce this issue that this error dialog will show after you drag the Search part. This bug will move to our backlog for next minor releases.
Thank you so much for your report in v7.9.0
We already released v7.9.1 that fixed this bug. Please upgrade and validate if the issue still occurs.
If you upgrade from v7.9.0, you can use Help > Check for updates… for an in-app upgrade. Learn more
More details regarding this release, see here.