Error while fitting data

[Himank-K]

• scikit-hts version:
• Python version:
• Operating System:

Description

Trying to fit a dataset.
dataset is structured properly, as hierarchy tree is properly built

(

ht = hts.hierarchy.HierarchyTree.from_nodes(nodes=hierarchy, df=df)

does not give any error and the tree is built properly how I want.)

No error while defining the model either.
(

clf = HTSRegressor(model='prophet', revision_method='BU', n_jobs=2)

gives no error)

But when I try to fit my data, it throws AttributeError saying:
'NoneType' object has no attribute 'fit'

What I Did

clf.fit(df, hierarchy)