Error while hovering over icon for PDF file.

[Horst]

I have installed Tracker PDF-Xchange editor and PDF preview works fine
but if I hover over a PDF file icon in the list it displays the error Cannot Decode for all PDFs.
I can also switch to the installed SumatraPDF preview handler
but its the same problem, preview works fine but hovering over the icon shows the error.

Screenshot - 09.01.2022 , 11_08_34.png (38.83 KiB) Viewed 510 times

[admin]

The hover box uses the thumbnail (handler) for the preview. So I assume you also get no thumbnails? Which is weird because PDF-Xchange has no such problems usually.

[Horst]

You are right, no thumbnails.
I'll try to find what updates made the problem.

[Horst]

Found it
There was some automatic update of SumatraPDF which has enabled the Thumbnail provider
but does not generate thumbnails.
After installing another SumatraPDF version its back again.