Using WealthLab 7 I suddenly received these error messages today. Trading with Alpaca was working fine all last week:
Argument Exception. An item with the same key has already been added. Key: System.Net.Http.Headers.HeaderDescriptor.
at System.Collections.Generic.Dictionary2.TryInsert(TKey key, TValue value, InsertionBehavior behavior) at System.Collections.Generic.Dictionary
2.Add(TKey key, TValue value)
at System.Net.Http.Headers.HttpHeaders.Add(String name, String value)
at
.
(Object , String , String ,
)
at WealthLab.Alpaca.AlpacaHistorical.Initialize()