I keep getting this error which isn't allowing me to complete the bootcamp and i dont know how to get by it:

Runtime Error: Error running OnEndOfAlgorithm(): KeyNotFoundException : This asset symbol (GC VOFJUCDY9W15) was not found in your security list. Please add this security or check it exists before using it with 'Securities.ContainsKey("GC VOFJUCDY9W15")'
at QuantConnect.Securities.SecurityManager.get_Item (QuantConnect.Symbol symbol) [0x00021] in <2e90ef4f2ffd4a758e24242ce2a36e80>:0
at QuantConnect.Securities.SecurityPortfolioManager.get_Item (QuantConnect.Symbol symbol) [0x00000] in <2e90ef4f2ffd4a758e24242ce2a36e80>:0
at QuantConnect.ExtendedDictionary`1[T].get_Item (System.String ticker) [0x0001b] in <2e90ef4f2ffd4a758e24242ce2a36e80>:0
a (wrapper managed-to-native) System.Reflection.MonoMethod.InternalInvoke(System.Reflection.MonoMethod,object,object[],System.Exception&)
at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00032] in <b0e1ad7573a24fd5a9f2af9595e677e7>:0 (Open Stacktrace)