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I am getting the following error almost randomly when I click on an engine:

ERROR: System.FormatException: Input string was not in a correct format.
   at System.Number.ThrowOverflowOrFormatException(ParsingStatus status, TypeCode type)
   at System.Double.Parse(String s)
   at TinyOpeningBook.<>c.<TryGetMove>b__3_0(String s) in C:\Users\sebas\Desktop\Sebastian\Projects\Chess\Chess Challen3
   at System.Linq.Enumerable.SelectArrayIterator`2.ToArray()
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at TinyOpeningBook.TryGetMove(Board board, Double randomlyDontUseBookProb) in C:\Users\sebas\Desktop\Sebastian\Proje3
   at auto_Bot_614.Bot_614.Think(Board boardOrig, Timer timerOrig) in C:\Users\sebas\Desktop\Sebastian\Projects\Chess\C9
   at BotRunner.NotifyTurnToMove(Board board) in C:\Users\sebas\Desktop\Sebastian\Projects\Chess\Chess Challenge\Tiny-C5
   at GameManager.NotifyTurnToMove() in C:\Users\sebas\Desktop\Sebastian\Projects\Chess\Chess Challenge\Tiny-Chess-Godo7
   at GameManager.StartGame() in C:\Users\sebas\Desktop\Sebastian\Projects\Chess\Chess Challenge\Tiny-Chess-Godot\scrip5
   at GameManager._Ready() in C:\Users\sebas\Desktop\Sebastian\Projects\Chess\Chess Challenge\Tiny-Chess-Godot\scripts\6
   at Godot.Node.InvokeGodotClassMethod(godot_string_name& method, NativeVariantPtrArgs args, godot_variant& ret)
   at GameManager.InvokeGodotClassMethod(godot_string_name& method, NativeVariantPtrArgs args, godot_variant& ret) in C5
   at Godot.Bridge.CSharpInstanceBridge.Call(IntPtr godotObjectGCHandle, godot_string_name* method, godot_variant** arg)
   at: godotsharp_pusherror (modules/mono/glue/runtime_interop.cpp:1324)