An item with the same key has already been added error message

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.Dictionary2.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()

I’m not sure but looks like (by stack trace) WealthLab uses its own Alpaca connector written on C# so it’s better to ask this question on their support forum.