Scheduler fails to run `nipa-update` job

I observed below error logs from scheduler service:
```
Running job...
Executing nipa-update for node 689c50e435a525e9763f4dd2
File list in /tmp/kernelci-nipa/netdev-results:
jsons
results
Traceback (most recent call last):
File "/home/kernelci/data/output/tmpb_0s7tb7/nipa-update", line 246, in main
results = job.run()
^^^^^^^^^
File "/home/kernelci/data/output/tmpb_0s7tb7/nipa-update", line 143, in run
return self._run(src_path)
^^^^^^^^^^^^^^^^^^^
File "/home/kernelci/data/output/tmpb_0s7tb7/nipa-update", line 219, in _run
raise Exception(f"Failed to run nipa-update for node {self._nodeid}: {r.stderr}")
Exception: Failed to run nipa-update for node 689c50e435a525e9763f4dd2: None
```

Start with the scheduler's `nipa-update` entry point and the `run`/`_run` frames shown in the traceback; reproduce the job using node `689c50e435a525e9763f4dd2` and inspect why the failure reports no stderr. Done means the scheduler completes this job without raising the reported exception.

Written by the indexing model from the issue text.