FileProvider throws exception on GetUriForFile

I followed the example code on the android developer reference on FileProviders but it won't work.

I have setup the path files/exports/ in the file provider definition in my Manifest and the referenced files does exist at that path.

In my Manifest:

<provider android:name="android.support.v4.content.FileProvider" android:authorities="com.company.app.fileprovider" android:exported="false" android:grantUriPermissions="true">
    <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths" />
</provider>

And in xml/file_paths.xml

<?xml version="1.0" encoding="UTF-8" ?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <files-path name="exports" path="exports/"/>
</paths>

Then I try to get the content-uri with the following code:

Java.IO.File exportFile = 
    new Java.IO.File ("/data/data/com.company.app/files/exports/file.pdf"); 
Android.Net.Uri exportUri = 
    Android.Support.V4.Content.FileProvider.GetUriForFile (this, "com.company.app.fileprovider", exportFile);

However I get this error:

Exception of type 'Java.Lang.NullPointerException' was thrown.
  at Android.Runtime.JNIEnv.CallStaticObjectMethod (IntPtr jclass, IntPtr jmethod, Android.Runtime.JValue[] parms) [0x00064] in /Users/builder/data/lanes/monodroid-mlion-monodroid-4.10.2-branch/4b53fbd0/source/monodroid/src/Mono.Android/src/Runtime/JNIEnv.g.cs:1160 
  at Android.Support.V4.Content.FileProvider.GetUriForFile (Android.Content.Context context, System.String authority, Java.IO.File file) [0x00000] in <filename unknown>:0 
  at com.company.App.ImageAndSubtitle.cloudStorageDidDownloadFile (System.Object sender, com.company.App.CloudStorageEventArgs args) [0x001f7] in /app_path/Screens/ImageAndSubtitle.cs:187 
  --- End of managed exception stack trace ---
java.lang.NullPointerException
    at android.support.v4.content.FileProvider.parsePathStrategy(FileProvider.java:243)
    at android.support.v4.content.FileProvider.getPathStrategy(FileProvider.java:217)
    at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:130)
    at mono.java.lang.RunnableImplementor.n_run(Native Method)
    at mono.java.lang.RunnableImplementor.run(RunnableImplementor.java:29)
    at android.os.Handler.handleCallback(Handler.java:615)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4838)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:875)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:642)
    at dalvik.system.NativeStart.main(Native Method)

From the Android source code I could hunt that down so far as I now know that this command will fail and return null:

ProviderInfo info = PackageManager.ResolveContentProvider("com.company.app.fileprovider", Android.Content.PM.PackageInfoFlags.MetaData);

But I have no idea why...