GluonTSDataError: Array 'feat_static_cat' has bad shape - expected 1 dimensions, got 2.

[pratikgehlott]

when I am using feat_static_cat, I am getting an error Array 'feat_static_cat' has a bad shape - expected 1 dimension, got 2. .

I am giving my feat_static_cat as -

'feat_static_cat' :[
df.f1[:pd.to_datetime('2018-12-31 00:00:00')],
df.f2[:pd.to_datetime('2018-12-31 00:00:00')],
df.f3[:pd.to_datetime('2018-12-31 00:00:00')],
df.f4[:pd.to_datetime('2018-12-31 00:00:00')],
df.f5[:pd.to_datetime('2018-12-31 00:00:00')],
df.f6[:pd.to_datetime('2018-12-31 00:00:00')],
df.f7[:pd.to_datetime('2018-12-31 00:00:00')],
df.f8[:pd.to_datetime('2018-12-31 00:00:00')],
df.f9[:pd.to_datetime('2018-12-31 00:00:00')],
df.f10[:pd.to_datetime('2018-12-31 00:00:00')],
df.f11[:pd.to_datetime('2018-12-31 00:00:00')],
]

These are all my categorical features.
Is this right? or should I do something different