Cannot import M4a-audio anymore

I have used Cubasis for a year now. Usually I create a Project, and then I use the Import Audio in the Media Bay to access the Google Drive my band uses for demos and download a M4a-file for insertion into the Project. Usually works like a charm.
Now, after not using Cubasis for a few months, the downloaded file seems nowhere to be found. It should be visible under “My audio files”? I can access the file on Google Drive and see the download bar, but then I cannot find it in the app.

Has anything changed in this process?