Some kind of security exception that I cannot trace to my own code

I was hoping someone would recognize this stack trace, as I cannot trace the error to my own code so I don't know how I can solve it:

Xamarin Exception Stack:
System.ArgumentNullException: Value cannot be null.
Parameter name: obj
  at (wrapper managed-to-native) System.Object.__icall_wrapper_mono_monitor_enter_v4_internal(object,intptr)
  at Mono.Net.Security.MobileAuthenticatedStream.get_IsAuthenticated () <0xbfb769b8 + 0x00043> in <09a58032fad04aa88077f64ffdcf83b6>:0
  at Mono.Net.Security.MobileAuthenticatedStream.get_CanRead () <0xbfb76c10 + 0x00017> in <09a58032fad04aa88077f64ffdcf83b6>:0
  at System.Net.Security.AuthenticatedStream..ctor (System.IO.Stream innerStream, System.Boolean leaveInnerStreamOpen) <0xbfc35170 + 0x0004b> in <09a58032fad04aa88077f64ffdcf83b6>:0
  at Mono.Net.Security.MobileAuthenticatedStream..ctor (System.IO.Stream innerStream, System.Boolean leaveInnerStreamOpen, System.Net.Security.SslStream owner, Mono.Security.Interface.MonoTlsSettings settings, Mono.Security.Interface.MonoTlsProvider provider) <0xbfb75568 + 0x00067> in <09a58032fad04aa88077f64ffdcf83b6>:0
  at Mono.Btls.MonoBtlsStream..ctor (System.IO.Stream innerStream, System.Boolean leaveInnerStreamOpen, System.Net.Security.SslStream owner, Mono.Security.Interface.MonoTlsSettings settings, Mono.Security.Interface.MonoTlsProvider provider) <0xbfb7f9b4 + 0x0001b> in <09a58032fad04aa88077f64ffdcf83b6>:0
  at (wrapper remoting-invoke-with-check) Mono.Btls.MonoBtlsStream..ctor(System.IO.Stream,bool,System.Net.Security.SslStream,Mono.Security.Interface.MonoTlsSettings,Mono.Security.Interface.MonoTlsProvider)

Thread 2:
0   android.os.MessageQueue.nativePollOnce(MessageQueue.java:-2)
1   android.os.MessageQueue.next(MessageQueue.java:325)
2   android.os.Looper.loop(Looper.java:142)
3   android.app.ActivityThread.main(ActivityThread.java:6938)
4   java.lang.reflect.Method.invoke(Method.java:-2)
5   com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
6   com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

Thread 8834:
0   java.lang.Object.wait(Object.java:-2)
1   java.lang.Daemons$ReferenceQueueDaemon.runInternal(Daemons.java:178)
2   java.lang.Daemons$Daemon.run(Daemons.java:103)
3   java.lang.Thread.run(Thread.java:764)

Thread 8835:
0   java.lang.Object.wait(Object.java:-2)
1   java.lang.Object.wait(Object.java:422)
2   java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:188)
3   java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:209)
4   java.lang.Daemons$FinalizerDaemon.runInternal(Daemons.java:232)
5   java.lang.Daemons$Daemon.run(Daemons.java:103)
6   java.lang.Thread.run(Thread.java:764)

Thread 8836:
0   java.lang.Thread.sleep(Thread.java:-2)
1   java.lang.Thread.sleep(Thread.java:373)
2   java.lang.Thread.sleep(Thread.java:314)
3   java.lang.Daemons$FinalizerWatchdogDaemon.sleepFor(Daemons.java:342)
4   java.lang.Daemons$FinalizerWatchdogDaemon.waitForFinalization(Daemons.java:364)
5   java.lang.Daemons$FinalizerWatchdogDaemon.runInternal(Daemons.java:281)
6   java.lang.Daemons$Daemon.run(Daemons.java:103)
7   java.lang.Thread.run(Thread.java:764)

Thread 8844:
0   java.lang.Object.wait(Object.java:-2)
1   java.lang.Thread.parkFor$(Thread.java:2135)
2   sun.misc.Unsafe.park(Unsafe.java:358)
3   java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:230)
4   java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2101)
5   java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.poll(ScheduledThreadPoolExecutor.java:1168)
6   java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.poll(ScheduledThreadPoolExecutor.java:1147)
7   java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1086)
8   java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1147)
9   java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
10  java.lang.Thread.run(Thread.java:764)

Thread 8846:
0   java.lang.Object.wait(Object.java:-2)
1   java.lang.Thread.parkFor$(Thread.java:2135)
2   sun.misc.Unsafe.park(Unsafe.java:358)
3   java.util.concurrent.locks.LockSupport.park(LockSupport.java:190)
4   java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2059)
5   java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
6   java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1087)
7   java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1147)
8   java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
9   java.lang.Thread.run(Thread.java:764)

Thread 8851:
0   android.os.MessageQueue.nativePollOnce(MessageQueue.java:-2)
1   android.os.MessageQueue.next(MessageQueue.java:325)
2   android.os.Looper.loop(Looper.java:142)
3   android.os.HandlerThread.run(HandlerThread.java:65)

Thread 8853:
0   android.os.MessageQueue.nativePollOnce(MessageQueue.java:-2)
1   android.os.MessageQueue.next(MessageQueue.java:325)
2   android.os.Looper.loop(Looper.java:142)
3   android.os.HandlerThread.run(HandlerThread.java:65)

Thread 8854:
0   android.os.MessageQueue.nativePollOnce(MessageQueue.java:-2)
1   android.os.MessageQueue.next(MessageQueue.java:325)
2   android.os.Looper.loop(Looper.java:142)
3   android.os.HandlerThread.run(HandlerThread.java:65)