Unable to open Canon C-Log 3 files in Premiere Pro

I'm baffled. I shot a 3-minute clip with the Canon EOS R6 in C-Log 3 4K/60, and Premiere Pro will not open it. 

Premiere tells me it can't open the file until I get a paid Creative Cloud subscription so that Adobe can install HEVC codecs on my computer. I have a subscription, and I'm logged in. I installed the HEVC codecs from Microsoft. No change.

It tells me "The importer reported a generic error."

It tells me I should delete a folder in C:users\Public....etc. and restart Premiere. No change.

I'm told by Google AI that I can try reinstalling Premiere, but it doesn't fix anything.

I tried switching to an earlier version of Premiere. No change.