Cant connect to server. Error

[Shneyder]

Message: Method not found: "! 0 System.Linq.Expressions.Expression`1.Compile (Boolean)".
     Stack: in MessagePack.MessagePackSerializer.CompiledMethods..ctor (Type type)
    in MessagePack.MessagePackSerializer. <> c. <. cctor> b__45_0 (Type t)
    at MessagePack.Internal.ThreadsafeTypeKeyHashTable`1.AddToBuckets (Entry [] buckets, Type newKey, Entry newEntryOrNull, Func`2 valueFactory, TValue & resultingValue)
    at MessagePack.Internal.ThreadsafeTypeKeyHashTable`1.TryAddInternal (Type key, Func`2 valueFactory, TValue & resultingValue)
    at MessagePack.Internal.ThreadsafeTypeKeyHashTable`1.GetOrAdd (Type key, Func`2 valueFactory)
    at MessagePack.MessagePackSerializer.Deserialize (Type type, ReadOnlyMemory`1 bytes, MessagePackSerializerOptions options, CancellationToken cancellationToken)
    at Intersect.Network.MessagePacker.Deserialize (Byte [] data) at C: \ TeamCity \ buildAgent \ work \ 40dc5d27074313da \ Intersect (Core) \ Network \ MessagePacker.cs: line 44

 

 

What is that mean?

[Cheshire]

I've had some luck fixing this by having people install the Net framework 4.7.1

 

No guarantees it'll fix it but worth a shot.