I wanted to run the CHT Docker Helper for 4.0 on an M1 Mac and it worked initially, but the next day when I tried to start Docker Desktop, I encountered the error below.
I found this related Docker issue and for me, deleting ~/.docker solved the issue and I was able to start up Docker again.
Creating "rootNode" subnodes: constructing "BackendServices" in "rootNode": doing migrations: migrating features.json: saving JSON: open /Users/michaelkohn/.docker/features.json: permission denied