Turbopack Error: Failed to write page endpoint /_error

[zZHorizonZz]

Turbopack version: b7da0c54
Next.js version: 0.0.0

Error message:

Turbopack Error: Failed to write page endpoint /_error

web:build: > Build error occurred
web:build: Error [TurbopackInternalError]: Failed to write page endpoint /_error
web:build:
web:build: Caused by:
web:build: - [project]/packages/apps/auth/dist/es/index.css [app-client] (css)
web:build: - Task effect panicked: Dependency tracking is disabled so invalidation is not allowed
web:build:
web:build: Debug info:
web:build: - Execution of TaskId { id: 2147483650 } transient failed
web:build: - Execution of get_all_written_entrypoints_with_issues_operation failed
web:build: - Execution of EntrypointsOperation::new failed
web:build: - Execution of all_entrypoints_write_to_disk_operation failed
web:build: - Execution of Project::emit_all_output_assets failed
web:build: - Execution of *emit_assets failed
web:build: - Execution of all_assets_from_entries_operation failed
web:build: - Execution of *all_assets_from_entries failed
web:build: - Execution of output_assets_operation failed
web:build: - Execution of <PageEndpoint as Endpoint>::output failed
web:build: - Failed to write page endpoint /_error
web:build: - Execution of PageEndpoint::output failed
web:build: - Execution of PageEndpoint::client_chunks failed
web:build: - Execution of *ChunkingContext::evaluated_chunk_group failed
web:build: - Execution of Project::client_chunking_context failed
web:build: - Execution of *get_client_chunking_context failed
web:build: - Execution of Project::module_ids failed
web:build: - Execution of Project::whole_app_module_graphs failed
web:build: - Execution of whole_app_module_graph_operation failed
web:build: - Execution of *ModuleGraph::from_single_graph failed
web:build: - Execution of SingleModuleGraph::new_with_entries failed
web:build: - [project]/packages/apps/auth/dist/es/index.css [app-client] (css)
web:build: - Execution of primary_chunkable_referenced_modules failed
web:build: - Execution of <CssModuleAsset as Module>::references failed
web:build: - Execution of parse_css failed
web:build: - Execution of <PostCssTransformedAsset as Asset>::content failed
web:build: - Execution of PostCssTransformedAsset::process failed
web:build: - Execution of get_evaluate_pool failed
web:build: - Execution of emit_evaluate_pool_assets_with_effects_operation failed
web:build: - Task effect panicked: Dependency tracking is disabled so invalidation is not allowed
web:build:     at <unknown> (TurbopackInternalError: Failed to write page endpoint /_error) {
web:build:   type: 'TurbopackInternalError'
web:build: }

[kishxrx]

This error isn’t coming from your code — it’s a Turbopack internal bug. The key line is:
Task effect panicked: Dependency tracking is disabled so invalidation is not allowed
which happens when Turbopack tries to process CSS (packages/apps/auth/dist/es/index.css) while building the _error page.

so what you need to do is
Update to the latest canary

npm install next@canary

Or disable Turbopack and fall back to Webpack in next.config.js:

const nextConfig = {
experimental: {
turbo: false,
},
}
module.exports = nextConfig