I decided to go back and get the "support" file, attached. I also noticed the recent thread on qubes-users about the kernel 5.4. However, when I tried this kernel, Qubes OS was completely unusable: starting from the point where the OS-level boot log would normally appear ("Starting service X...", etc.), the screen showed garbled pixels. I thought the system might be waiting for the disk encryption password and I tried entering it, but that did not help.
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