I am unable to close it. I am unable to resize it. Each time I open it, the dialogue box gets larger.
I am using Libreoffice 7.5 on Ubuntu 22.04.
It seems like an attached modal dialog, if using GNOME try if using gnome-tweaks and there under Windows switching Attach Modal Dialogues off helps.
I am on Ubuntu 23.04 and LO 7.5.3.2, under VirtualBox, so my experience may not be very useful…
This is a strange window. I can resize it but then it grows up and down and the same time (or left and right at the same time). I cannot move it, it seems attached to LibreOffice.
At least you can close it with Alt-c (Cancel) or Alt-o (OK).
Thanks for this comment. Why are you using the Windows program under VirtualBox rather than the Linux version? Do you have the same problem?
My laptop is using Windows 11 as its main OS and I have a virtual machine with Ubuntu for learning more about Linux.