Turbopack Error: Failed to write app endpoint /page

[omkashyap28]

Turbopack version: 299180d3
Next.js version: 16.3.5

Error message:

Failed to write app endpoint /page

Caused by:
- app_dir must be a directory

Debug info:
- Execution of Project::hmr_version_state failed
- Execution of hmr_version_operation failed
- Execution of VersionedContentMap::get failed
- Execution of VersionedContentMap::get_asset failed
- Execution of VersionedContentMap::compute_entry failed
- Execution of *emit_assets failed
- Execution of all_assets_from_entries_operation failed
- Execution of *all_assets_from_entries failed
- Execution of endpoint_output_assets_operation failed
- Execution of <AppEndpoint as Endpoint>::output failed
- Failed to write app endpoint /page
- Execution of *all_asset_paths failed
- Execution of *AppEndpointOutput::output_assets failed
- Execution of AppEndpoint::output failed
- Execution of AppEndpoint::app_page_entry failed
- Execution of *get_app_page_entry failed
- Execution of AppProject::rsc_module_context failed
- Execution of *ModuleAssetContext::new failed
- Execution of AppProject::rsc_resolve_options_context failed
- Execution of *get_server_resolve_options_context failed
- Execution of AppProject::collected_root_params failed
- Execution of *collect_root_params failed
- Execution of get_entrypoints failed
- Execution of *directory_tree_to_entrypoints failed
- Execution of get_global_metadata failed
- app_dir must be a directory