It’s honestly really frustrating. I wanted to get into Trellis, but as a solo developer I don’t have days on end to wait for a solution.
I ran yarn build before yarn start. Maybe I’m crazy but it’s not that the file doesn’t exist. It’s that the server is serving the stylesheet as wrong MIME type. If I was using a different theme or product, I’d understand, but I expect Trellis, Bedrock and Roots to play nicely together out of the box.