I have the same problem with a MRPE Check.
Crash report: 5587bac0-17ce-11ed-a313-a0369ff0d398
ValueError ('notice' must be non-empty str or None, got )
File "/omd/sites/zdv/lib/python3/cmk/base/agent_based/checking/__init__.py", line 470, in get_aggregated_result
result = _aggregate_results(
File "/omd/sites/zdv/lib/python3/cmk/base/agent_based/checking/__init__.py", line 578, in _aggregate_results
perfdata, results = _consume_and_dispatch_result_types(subresults)
File "/omd/sites/zdv/lib/python3/cmk/base/agent_based/checking/__init__.py", line 622, in _consume_and_dispatch_result_types
for subr in subresults:
File "/omd/sites/zdv/lib/python3/cmk/base/agent_based/checking/_cluster_modes.py", line 145, in _cluster_check
yield from summarizer.secondary_results(
File "/omd/sites/zdv/lib/python3/cmk/base/agent_based/checking/_cluster_modes.py", line 225, in secondary_results
yield from (
File "/omd/sites/zdv/lib/python3/cmk/base/agent_based/checking/_cluster_modes.py", line 226, in <genexpr>
Result(
File "/omd/sites/zdv/lib/python3/cmk/base/api/agent_based/checking_classes.py", line 367, in __new__
state, summary, details = _create_result_fields(**kwargs)
File "/omd/sites/zdv/lib/python3/cmk/base/api/agent_based/checking_classes.py", line 405, in _create_result_fields
raise ValueError(f"'{name}' must be non-empty str or None, got {var}")
{'details': '[nfsrefer-02]: Check command used in metric system: '
'check_nfsreferrals_lock',
'name': 'notice',
'notice': '',
'state': <State.OK: 0>,
'summary': None,
'var': ''}