Describe the solution

npm create cloudflare@latest -- my-remix-app --framework=remix still uses an old ESLint version with the old config format. I would recommend updating the ESLint and the config to the new flat config format. Also the yarn equivalent command yarn create cloudflare@latest my-remix-app --framework=remix ran into an error for me but I got it working with npm, not sure if this might also be an issue.