Converting PDF to Indesign in Beta not working?

Hello,

I am trying to convert a PDF document to Indesign by using Indesign Beta, latest update 19.5.

However, it doesn't seem to work.

In the dropdown menu, I can't find the PDF extension (see attached screenshot); and when I attempt to convert a PDF file through "All files", the opening screen disappears and the screen remains blanco.

I have tried to delete my preferences (it didn't help); I checked if the files were made through Indesign (which they were), and I also have tested by exporting an Indesign file to PDF myself, and tried to open that file in Beta, but this also didn't work.

I found a similair thread on the forum, but this didn't contain the answer I was searching for.

Am I foolishly missing something?

Note: I use Windows; fully connected to internet; logged in at Creative Cloud, I'm in region continental Europe.

Thanks in advance for suggestions!