Everest tests fails with ValueError: cannot concat empty list

[berland]

Seen in https://github.com/equinor/komodo-releases/actions/runs/13231502466/job/36929845501

Traceback (most recent call last):
  File "/prog/res/komodo/bleeding-20250210-0207-py311-rhel8/root/bin/everest", line 8, in <module>
    sys.exit(start_everest())
             ^^^^^^^^^^^^^^^
  File "/prog/res/komodo/bleeding-20250210-0207-py311-rhel8/root/lib64/python3.11/site-packages/everest/bin/main.py", line 140, in start_everest
    EverestMain(args)
  File "/prog/res/komodo/bleeding-20250210-0207-py311-rhel8/root/lib64/python3.11/site-packages/everest/bin/main.py", line 86, in __init__
    getattr(self, parsed_args.command)(args[2:])
  File "/prog/res/komodo/bleeding-20250210-0207-py311-rhel8/root/lib64/python3.11/site-packages/everest/bin/main.py", line 102, in run
    everest_entry(args)
  File "/prog/res/komodo/bleeding-20250210-0207-py311-rhel8/root/lib64/python3.11/site-packages/everest/bin/everest_script.py", line 56, in everest_entry
    asyncio.run(run_everest(options))
  File "/usr/lib64/python3.11/asyncio/runners.py", line 190, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/asyncio/base_events.py", line 654, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/prog/res/komodo/bleeding-20250210-0207-py311-rhel8/root/lib64/python3.11/site-packages/everest/bin/everest_script.py", line 147, in run_everest
    run_detached_monitor(
  File "/prog/res/komodo/bleeding-20250210-0207-py311-rhel8/root/lib64/python3.11/site-packages/everest/bin/utils.py", line 274, in run_detached_monitor
    opt_status = get_opt_status(optimization_output_dir)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/prog/res/komodo/bleeding-20250210-0207-py311-rhel8/root/lib64/python3.11/site-packages/everest/detached/__init__.py", line 152, in get_opt_status
    expected_objectives = pl.concat(
                          ^^^^^^^^^^
  File "/prog/res/komodo/bleeding-20250210-0207-py311-rhel8/root/lib64/python3.11/site-packages/polars/functions/eager.py", line 136, in concat
    raise ValueError(msg)
ValueError: cannot concat empty list