langgenius/dify · error · NotFound

Credential not found.

Error message

Credential not found.

What it means

Flask NotFound (HTTP 404) raised at data_source.py:249 in DataSourceNotionListApi.get (GET /data-source/notion/pre-import/pages) when DatasourceProviderService.get_datasource_credentials returns a falsy value for the given credential_id, provider='notion_datasource', plugin_id='langgenius/notion_datasource'. The Notion OAuth credential for this tenant/credential_id does not exist (or was revoked) in the credentials store.

Source

Thrown at api/controllers/console/datasets/data_source.py:249

    @with_current_tenant_id
    @with_session(write=False)
    @model_validate(DataSourceNotionListQuery)
    def get(
        self,
        req_data: DataSourceNotionListQuery,
        session: Session,
        current_tenant_id: str,
        current_user: Account,
    ) -> tuple[dict[str, Any], int]:
        datasource_provider_service = DatasourceProviderService()
        credential = datasource_provider_service.get_datasource_credentials(
            tenant_id=current_tenant_id,
            credential_id=req_data.credential_id,
            provider="notion_datasource",
            plugin_id="langgenius/notion_datasource",
        )
        if not credential:
            raise NotFound("Credential not found.")
        exist_page_ids = []
        # import notion in the exist dataset
        if req_data.dataset_id:
            dataset = DatasetService.get_dataset(req_data.dataset_id, session)
            if not dataset:
                raise NotFound("Dataset not found.")
            if dataset.data_source_type != "notion_import":
                raise ValueError("Dataset is not notion type.")

            documents = session.scalars(
                select(Document).where(
                    Document.dataset_id == req_data.dataset_id,
                    Document.tenant_id == current_tenant_id,
                    Document.data_source_type == "notion_import",
                    Document.enabled.is_(True),
                )
            ).all()
            if documents:

View on GitHub (pinned to ef8544b173)

Solutions

1. Re-authorize the Notion datasource to obtain a fresh credential_id, then use that id in the query.
2. List existing credentials for the tenant to find the current notion_datasource credential_id.
3. Confirm the plugin 'langgenius/notion_datasource' is installed and enabled; a missing plugin yields no credential.
4. Ensure the request is scoped to the tenant that owns the credential.

// Verify the credential exists before listing Notion pages.
const creds = await listDatasourceCredentials(currentTenantId);
if (!creds.some(c => c.id === credentialId && c.provider === 'notion_datasource')) {
  throw new Error('Re-authorize Notion to get a fresh credential_id');
}

function isNotionCredential(c: {provider: string; id: string}, id: string): boolean {
  return c.provider === 'notion_datasource' && c.id === id;
}

try {
  await listNotionPages(credentialId);
} catch (e) {
  if (e.status === 404 && /Credential not found/i.test(e.message)) { reAuthNotion(); }
  else throw e;
}

When it happens

Trigger: GET /console/api/data-source/notion/pre-import/pages?credential_id=<id> where the credential_id is unknown, belongs to another tenant, or the Notion datasource credential was deleted/expired before this pre-import listing call.

Common situations: User opened the Notion import wizard with a stale credential_id (e.g. after re-authenticating Notion which created a new credential); credential store cleanup removed the old entry; or the plugin credential was never successfully saved.

Related errors

• Dataset not found.
• Data source binding not found.
• File not found.
• not_found
• not_found

AI-assisted analysis of langgenius/dify@ef8544b173 (2026-08-12). Data as JSON: /api/errors/c7edc4165c8bdbec. Report an issue: GitHub.