Code 500

The `Code 500` error usually indicates that a cloud-rendering session was assigned to a render node that had not completed application synchronization successfully.

## Cause

In some cases, cloud-rendering concurrency may be allocated to a render node before application synchronization has finished. If the target node has not completed synchronization, the session may fail and return `Code 500`.

## Solution

1. Log in to the LarkXR management backend.
2. Open the **Synchronization Management** page.
3. Check whether there is a recent application synchronization failure record.
4. If a synchronization failure is found, resolve the synchronization issue first.
5. After synchronization completes successfully, try launching the application again.

![Synchronization Management page example](/media/202605/PowerToys_Paste_20260512103830_20260512104035539071.png)

## Notes

- This issue is related to application synchronization status on the render node.
- If `Code 500` appears immediately after application updates or node changes, synchronization status should be checked first.
- If no synchronization failure record is found, continue investigating node status and application availability on the assigned render server.