Input link from DA: https://cernbox.cern.ch/index.php/s/zCwGOc9OPJcYkB2

Using uproot:

pip install uproot3 #DA -- can you confirm you used uproot3 and not uproot4?

Link to ROC pickle files: https://cernbox.cern.ch/index.php/s/m151FrCv55G42Ce