Error: source file not readable

I've downloaded a theme (available at https://github.com/SirYodah/NieR_Android_Theme), but it refuses to load.

If I don't place it under /Kustom/wallpapers, it tells me "copied", but that does not do a single thing. If I do place it under /Kustom/wallpapers, it tells me "error: source file not readable", both in its original .klwp extension and .klwp.zip. Is there a way to fix this issue? I do own the PRO version, so I believe I should be able to load themes.

On the load presets screen do not load from the file in the top right corner instead click the exported tab on the top right and load your exports from there.

In other words on the load preset screen there's three categories.

featured, installed, exported.

Click exported