@tor.sh, That would be 0.5.
Hmm there seem to be a couple of necro bump posts lately from old topics from last year. Great that there’s activity, but potentially scary, bringing light things that are now considered to be the norm.
Clockwork OS 0.5 saw a lot of changes, including to the Pico-8 installed. You may need to run it once without any of the pico-8 libraries in place.
See this post.