Code execution node exception.

### Self Checks

- [x] I have read the [Contributing Guide](https://github.com/langgenius/dify/blob/main/CONTRIBUTING.md) and [Language Policy](https://github.com/langgenius/dify/issues/1542).
- [x] This is only for bug report, if you would like to ask a question, please head to [Discussions](https://github.com/langgenius/dify/discussions/categories/general).
- [x] I have searched for existing issues [search for existing issues](https://github.com/langgenius/dify/issues), including closed ones.
- [x] I confirm that I am using English to submit this report, otherwise it will be closed.
- [x] 【中文用户 & Non English User】请使用英语提交，否则会被关闭 ：）
- [x] Please do not modify this template :) and fill in all the required fields.

### Dify version

1.11.2

### Cloud or Self Hosted

Self Hosted (Source)

### Steps to reproduce

Code execution node exception: Failed to execute code, which is likely a network issue, please check if the sandbox service is running. ( Error: Failed to execute code, got status code 502, please check if the sandbox service is running )

### ✔️ Expected Behavior

Code execution node normal

### ❌ Actual Behavior

_No response_

Start by reproducing the code execution node failure in the self-hosted 1.11.2 setup and checking whether the sandbox service is running and returning HTTP 502. Done means the node executes code normally without the sandbox-service exception.

Written by the indexing model from the issue text.