I'm facing similar problem: Can't finish previewing. Running on Win10. Used to edit the work as PDF file with no problems. After upgrading to 23.1 the things seem to go wrong and the picture is displayed in outline mode. The levels seem to be there but nothing in those. I managed to "convert" the PDF file into AI file but all the levels were lost.
I'm facing similar problem: Can't finish previewing. Running on Win10. Used to edit the work as PDF file with no problems. After upgrading to 23.1 the things seem to go wrong and the picture is displayed in outline mode. The levels seem to be there but nothing in those. I managed to "convert" the PDF file into AI file but all the levels were lost.