title: Xamarin ModernHttpClient exception in Android
body: <p>I have been using the plugin for quite a while and I never had any problems with it, but in my new project the OkHttp library of ModernHttpClient doesn't work for some reasons.</p>
  
  <p>Each Http request throws the exception:</p>
  
  <pre><code>12-10 18:13:20.527 W/        ( 4373): Missing method Android.Runtime.JNIEnv::CallStaticObjectMethod(intptr,intptr,JValue*) in assembly Mono.Android.dll, referenced in assembly OkHttp.dll
  mvx:Diagnostic: 17.36 Exception occurred in request: System.MissingMethodException: Method not found: 'Android.Runtime.JNIEnv.CallStaticObjectMethod'.
  12-10 18:13:20.537 I/mono-stdout( 4373): mvx:Diagnostic: 17.36 Exception occurred in request: System.MissingMethodException: Method not found: 'Android.Runtime.JNIEnv.CallStaticObjectMethod'.
  
    at ModernHttpClient.NativeMessageHandler+&lt;SendAsync&gt;c__async0.MoveNext () [0x00138] in /Users/paul/code/paulcbetts/modernhttpclient/src/ModernHttpClient/Android/OkHttpNetworkHandler.cs:93 
  --- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in &lt;filename unknown&gt;:0 
  12-10 18:13:20.537 I/mono-stdout( 4373):   at ModernHttpClient.NativeMessageHandler+&lt;SendAsync&gt;c__async0.MoveNext () [0x00138] in /Users/paul/code/paulcbetts/modernhttpclient/src/ModernHttpClient/Android/OkHttpNetworkHandler.cs:93 
  [0:] mvx:Diagnostic: 17.36 Exception occurred in request: System.MissingMethodException: Method not found: 'Android.Runtime.JNIEnv.CallStaticObjectMethod'.
    at ModernHttpClient.NativeMessageHandler+&lt;SendAsync&gt;c__async0.MoveNext () [0x00138] in /Users/paul/code/paulcbetts/modernhttpclient/src/ModernHttpClient/Android/OkHttpNetworkHandler.cs:93 
  --- End of stack trace from previous location where exception was thrown ---
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in &lt;filename unknown&gt;:0 
    at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in &lt;filename unknown&gt;:0 
    at System.Net.Http.HttpClient+&lt;SendAsyncWorker&gt;c__async0.MoveNext () [0x00000] in &lt;filename unknown&gt;:0 
  --- End of stack trace from previous location where exception was thrown --
  </code></pre>
  
  <p>What am I doing wrong? Is there a way to fix it?</p>