Hello, I found an error in a quantconnect code of one of Quantpedia's strategies : Net Current Asset Value Effect

When I try to run myself the backtest attached to this strategy, I get this error : 

Runtime Error: TypeError : property is read-only
at FineSelectionFunction in main.py:line 36
:: i.MarketCap = float(i.EarningReports.BasicAverageShares.ThreeMonths * (i.EarningReports.BasicEPS.TwelveMonths*i.ValuationRatios.PERatio))
TypeError : property is read-only

I'm pretty new to coding with Quantconnect, so I can't figure out what's wrong with the code.
Can anybody help ?