### Apache Airflow version

2.5.1

### What happened

/calendar page give a problem, here is the capture



![屏幕截图 2023-01-30 093116](https://user-images.githubusercontent.com/19165258/215369479-9fc7de5c-f190-460c-9cf7-9ab27d8ac355.png)


### What you think should happen instead

_No response_

### How to reproduce

_No response_

### Operating System

Ubuntu 22.04.1 LTS

### Versions of Apache Airflow Providers

Distributor ID: Ubuntu
Description:    Ubuntu 22.04.1 LTS
Release:        22.04
Codename:       jammy

### Deployment

Other

### Deployment details


Distributor ID: Ubuntu
Description:    Ubuntu 22.04.1 LTS
Release:        22.04
Codename:       jammy

### Anything else

_No response_

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [x] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

return self.LOG_NAME
    def get_external_log_url(self, *args, **kwargs) -> str:
        return "http://external-service.com"
    @property
    def supports_external_link(self) -> bool:
        return self._supports_external_link
@pytest.mark.parametrize("endpoint", ["graph", "tree"])
@unittest.mock.patch(
    "airflow.utils.log.log_reader.TaskLogReader.log_handler",
    new_callable=unittest.mock.PropertyMock,
    return_value=_ExternalHandler(),
)
def test_show_external_log_redirect_link_with_external_log_handler(
    _, capture_templates, admin_client, endpoint
):
    """Show external links if log handler is external."""
    url = f"{endpoint}?dag_id=example_bash_operator"
    with capture_templates() as templates:
        admin_client.get(url, follow_redirects=True)
        ctx = templates[0].local_context
        assert ctx["show_external_log_redirect"]
        assert ctx["external_log_name"] == _ExternalHandler.LOG_NAME
@pytest.mark.parametrize("endpoint", ["graph", "tree"])
@unittest.mock.patch(
    "airflow.utils.log.log_reader.TaskLogReader.log_handler",
    new_callable=unittest.mock.PropertyMock,
    return_value=_ExternalHandler(),
)
def test_external_log_redirect_link_with_external_log_handler_not_shown(