22.08.2 on Mac can't import KRA files

Tested with kdenlive-22.08.2.dmg

To reproduce, open file-types-images-22.08.2.kdenlive from https://invent.kde.org/erjiang/kdenlive-backcompat and render the video. You'll see that the 10th clip (kdenlive-logo.kra) looks like a thumbnail of a text file in the timeline, and renders as the text "INVALID" in the rendered output.