GetActivePositionsAsync returning NullReferenceException

[basxib]

I traced down the error and it's coming from BaseConverter.ReadJson in CryptoExchange project.
Here's the stack trace:
System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=CryptoExchange.Net
StackTrace:

at CryptoExchange.Net.Converters.BaseConverter`1.<>c__DisplayClass5_0.<ReadJson>b__0(KeyValuePair`2 v) in \CryptoExchange.Net\Converters\BaseConverter.cs:line 28
at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
at CryptoExchange.Net.Converters.BaseConverter`1.ReadJson(JsonReader reader, Type objectType, Object existingValue, JsonSerializer serializer) in C:\Users\Ahd-w10\source\repos\CryptoExchange.Net\Converters\BaseConverter.cs:line 32
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.DeserializeConvertable(JsonConverter converter, JsonReader reader, Type objectType, Object existingValue)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)

[JKorf]

Hi, can you put LogVerbosity on Debug and share the data that was returned? There is an error parsing the returned data.

[basxib]

I found out that in BaseConverters.ReadJson() reader.Value was null and this line doesn't check for null before calling .ToString()
var val = Mapping.SingleOrDefault(v => v.Value == reader.Value.ToString()).Key;

I solved it by simply adding a null check like this:
var val = Mapping.SingleOrDefault(v => v.Value == reader.Value?.ToString()).Key;

I saw you solved this on CryptoExchange.net 4 hours ago.
Now it's working like a charm and retrieving the right positions.

[JKorf]

Ah okay. Yes I noticed there was no error/null checking on that bit so I added that after I saw where your error was coming from, but didn't know for sure if it would solve your problem. Glad it's fixed!