eval bev error

[ElfenSterben]

./tools/uniad_dist_eval.sh ./projects/configs/bevformer/base_bevformer.py ./projects/work_dirs/bevformer/base_bevformer/latest.pth 8

[>>>>>>>>>>>>>>>>>>>>>>>>>>] 6000/6000, 13.8 task/s, elapsed: 436s, ETA:     0s
writing results to output/results.pkl
Traceback (most recent call last):
  File "/root/workspace/UniAD/./tools/test.py", line 263, in <module>
    main()
  File "/root/workspace/UniAD/./tools/test.py", line 257, in main
    print(dataset.evaluate(outputs, **eval_kwargs))
  File "/root/workspace/UniAD/venv/lib/python3.9/site-packages/mmdet3d/datasets/nuscenes_dataset.py", line 503, in evaluate
    result_files, tmp_dir = self.format_results(results, jsonfile_prefix)
  File "/root/workspace/UniAD/venv/lib/python3.9/site-packages/mmdet3d/datasets/nuscenes_dataset.py", line 443, in format_results
    assert isinstance(results, list), 'results must be a list'
AssertionError: results must be a list
ERROR:torch.distributed.elastic.multiprocessing.api:failed (exitcode: 1) local_rank: 0 (pid: 285776) of binary: /root/workspace/UniAD/venv/bin/python
Traceback (most recent call last):
  File "/root/workspace/UniAD/venv/bin/torchrun", line 7, in <module>
    sys.exit(main())
  File "/root/workspace/UniAD/venv/lib/python3.9/site-packages/torch/distributed/elastic/multiprocessing/errors/__init__.py", line 346, in wrapper
    return f(*args, **kwargs)
  File "/root/workspace/UniAD/venv/lib/python3.9/site-packages/torch/distributed/run.py", line 794, in main
    run(args)
  File "/root/workspace/UniAD/venv/lib/python3.9/site-packages/torch/distributed/run.py", line 785, in run
    elastic_launch(
  File "/root/workspace/UniAD/venv/lib/python3.9/site-packages/torch/distributed/launcher/api.py", line 134, in __call__
    return launch_agent(self._config, self._entrypoint, list(args))
  File "/root/workspace/UniAD/venv/lib/python3.9/site-packages/torch/distributed/launcher/api.py", line 250, in launch_agent
    raise ChildFailedError(
torch.distributed.elastic.multiprocessing.errors.ChildFailedError:

[dd-xx-dot]

I'm getting a same error during evaluation.
Have you successfully resolved this issue before? If so, what did you do?