the STRING opcode argument must be quoted error in pkl file

Question

I am using win 10, jupyter notebook, python_version(3.8.12). I am trying to load dataset 'RML2016.10a_dict.pkl' from https://www.deepsig.ai/datasets
, but I keep getting the error
UnpicklingError: the STRING opcode argument must be quoted
This is the used code

filename = "RML2016.10a_dict.pkl"
open_file = open(filename,'rb')
data = cPickle.load(open_file, encoding='latin1')

I have tried to follow the solutions provided in error in loading pickle, but none of them worked for me.