Turbopack Error: Failed to write app endpoint /page

[Badfox16]

Turbopack version: db56d775
Next.js version: 0.0.0

Error message:

Failed to write app endpoint /page

Caused by:
- [project]/src/app/globals.css [app-client] (css)
- failed to convert rope into string
- invalid utf-8 sequence of 1 bytes from index 0

Debug info:
- Execution of TaskId { id: 2147483652 } transient failed
- Execution of get_written_endpoint_with_issues_operation failed
- Execution of endpoint_write_to_disk failed
- Execution of <AppEndpoint as Endpoint>::output failed
- Failed to write app endpoint /page
- Execution of AppEndpoint::output failed
- Execution of AppProject::app_module_graphs failed
- Execution of *<AppEndpoint as Endpoint>::additional_entries failed
- Execution of *ModuleGraph::from_graphs failed
- Execution of SingleModuleGraph::new_with_entries_visited_intern failed
- [project]/src/app/globals.css [app-client] (css)
- Execution of primary_chunkable_referenced_modules failed
- Execution of <CssModuleAsset as Module>::references failed
- Execution of parse_css failed
- Execution of <PostCssTransformedAsset as Asset>::content failed
- Execution of PostCssTransformedAsset::process failed
- failed to convert rope into string
- invalid utf-8 sequence of 1 bytes from index 0

[OrcnTester]

Had the same issue — fixed it by:

Re-saving globals.css as UTF-8 (no BOM) + LF line endings (VS Code → “Save with Encoding → UTF-8”).

Adjusting postcss.config.js:

module.exports = {
plugins: {
'@tailwindcss/postcss': {}, // Tailwind v4
autoprefixer: {},
},
};

(If using Tailwind v3 → use tailwindcss instead.)

Delete .next/ → npm run dev.

No more invalid utf-8 sequence error 🚀