KeyError: 'class' when writing dataframe list for a collection

[virtualarchitectures]

I'm trying to use the collection operations to read a collection from the CSO's API following the example from the pyjstat documentation:

from pyjstat import pyjstat
toc_url = 'https://ws.cso.ie/public/api.restful/PxStat.Data.Cube_API.ReadCollection'
collection = pyjstat.Collection.read(toc_url)
df_list = collection.write('dataframe_list')
df_list

Currently the write() operation returns a key error as follows:

KeyError                                  Traceback (most recent call last)
Cell In[19], line 2
      1 collection = pyjstat.Collection.read(toc_url)
----> 2 df_list = collection.write('dataframe_list')
      3 df_list

File ~\anaconda3\envs\CSO_API\lib\site-packages\pyjstat\pyjstat.py:998, in Collection.write(self, output)
    996 elif output == 'dataframe_list':
    997     df_list = []
--> 998     unnest_collection(self, df_list)
    999     return df_list
   1000 else:

File ~\anaconda3\envs\CSO_API\lib\site-packages\pyjstat\pyjstat.py:144, in unnest_collection(collection, df_list)
    130 """Unnest collection extracting its datasets and converting them to df.
    131 
    132 Args:
   (...)
    141 
    142 """
    143 for item in collection['link']['item']:
--> 144     if item['class'] == 'dataset':
    145         df_list.append(Dataset.read(item['href']).write('dataframe'))
    146     elif item['class'] == 'collection':

KeyError: 'class'