"t.forEach is not a function"

When I first use the "Files" tab and navigate to my private folder, I get a toast message that says "t.forEach is not a function." I just set up a 2nd laptop and received the same error message.

I'm not sure if this is related, but I have never used my /keybase/private/myname folder before, and in fact, it did not exist prior to this message. I've since enabled the mac os x "Finder" extension and it seems to work fine now. No error message afterward.

Start by reproducing the error from the Files tab while navigating to a private folder on macOS, comparing behavior before and after enabling the Finder extension. Trace the source of the "t.forEach is not a function" toast and identify the folder data that triggers it. Done means the private folder opens without the error toast.

Written by the indexing model from the issue text.