Since that’s an old ODK-X version, it’s very difficult to chase and resolve bugs.
Normally we would get the log files from the device to check for errors. You told me you’ve done that, and there’s nothing obvious appearing in the logs.
The next step you mentioned is to check for configuration issues on that device.
If you discover the cause of the error, please update this thread. It may be useful for someone else in the same situation!