ID 15.1.1, Win10

31.8.2020 The problem exist also in New-File Window: only the black window, one can see in the attachment

After importing the comments from a PDF file there is nothing in the PDF Comments Window. Although the comments are visable in main text, I cannot accept them in PDF comments windows, because I don't see them there.

I have the same problem with the main InDesign window: when no file is opened, I see only black flat, no icons of previously opened files, as it was in previous versions...