How to use the Pandas frequency ‘C’ in gluonts.dataset.common.ListDataset

freq = pd.offsets.CustomBusinessDay(calendar=SSEExchangeCalendar())
dd = ListDataset(data, freq=freq)

File “/Users/boss/App/ssm/venv/lib/python3.12/site-packages/gluonts/dataset/common.py”, line 252, in ListDataset
return list(
^^^^^
File “/Users/boss/App/ssm/venv/lib/python3.12/site-packages/gluonts/dataset/common.py”, line 423, in call
data = t(data)
^^^^^^^
File “/Users/boss/App/ssm/venv/lib/python3.12/site-packages/gluonts/dataset/common.py”, line 292, in call
raise GluonTSDataError(
gluonts.exceptions.GluonTSDataError: Error “CustomBusinessDay cannot be used with Period or PeriodDtype” occurred, when reading field “start”