JsonReaderException: Unexpected character encountered while parsing value: <. Path '', line 0, position 0.
--LineNumber: 0
--LinePosition: 0
StackTrace:
   在 Newtonsoft.Json.JsonTextReader.ParseValue()
   在 Newtonsoft.Json.Linq.JToken.ReadFrom(JsonReader reader, JsonLoadSettings settings)
   在 Newtonsoft.Json.Linq.JToken.Parse(String json, JsonLoadSettings settings)
   在 DynamicClass.Platform.<FreshRatioDataAsync>d__1f.MoveNext()
--- 引发异常的上一位置中堆栈跟踪的末尾 ---
   在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   在 DynamicClass.MainViewModel.<RefreshPriceDataAsync>d__5.MoveNext()
--- 引发异常的上一位置中堆栈跟踪的末尾 ---
   在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   在 DynamicClass.MainViewModel.<RefreshAllPriceDataAsync>d__0.MoveNext()
--- 引发异常的上一位置中堆栈跟踪的末尾 ---
   在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   在 CommunityToolkit.Mvvm.Input.AsyncRelayCommand.<AwaitAndThrowIfFailed>d__40.MoveNext()
--- 引发异常的上一位置中堆栈跟踪的末尾 ---
   在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   在 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

JsonReaderException: Unexpected character encountered while parsing value: <. Path '', line 0, position 0.
--LineNumber: 0
--LinePosition: 0
StackTrace:
   at Newtonsoft.Json.JsonTextReader.ParseValue()
   at Newtonsoft.Json.Linq.JArray.Load(JsonReader reader, JsonLoadSettings settings)
   at Newtonsoft.Json.Linq.JArray.Parse(String json, JsonLoadSettings settings)
   at DynamicClass.<API_SearchRole>d__dd.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at DynamicClass.<Tab_bar_SelectionChanged>d__2b.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)