AssetConverter.Convert()

Hey, I am having crashes on my Cbot, and 

var ConvRate = AssetConverter.Convert(1, Symbol.QuoteAsset, Symbol.BaseAsset);

this works on US500 FTMO, but crashes on US100 FTMO, OIL FTMO on MacOS systems. 

It says "Crashed with error."  in the Logs. It still crashes even if I put a try-catch block

But in windows OS, even with log below, it works normally on Windows

I see only “Failed to load asset ‘index’: asset not found."

Anyone has an idea?