[Fire Q&A, Help & Troubleshooting] Zeranoe:
Getting the same error here, so I did a logcat on it:

E/DatabaseUtils(15437): Writing exception to parcel

E/DatabaseUtils(15437): java.lang.SecurityException: Permission Denial: reading com.android.providers.downloads.DownloadProvider uri content://downloads/all_downloads/73 from pid=15497, uid=10016 requires android.permission.ACCESS_ALL_DOWNLOADS, or grantUriPermission()

E/DatabaseUtils(15437):	at android.content.ContentProvider.enforceReadPermissionInner(ContentProvider.java:539)

E/DatabaseUtils(15437):	at android.content.ContentProvider$Transport.enforceReadPermission(ContentProvider.java:452)

E/DatabaseUtils(15437):	at android.content.ContentProvider$Transport.enforceFilePermission(ContentProvider.java:443)

E/DatabaseUtils(15437):	at android.content.ContentProvider$Transport.openTypedAssetFile(ContentProvider.java:388)

E/DatabaseUtils(15437):	at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:313)

E/DatabaseUtils(15437):	at android.os.Binder.execTransact(Binder.java:446)

W/GAV2 (15497): Thread[Background tasks,5,main]: dispatch call queued. Need to call GAServiceManager.getInstance().initialize().

--------- beginning of crash

E/AndroidRuntime(15497): FATAL EXCEPTION: Background tasks

E/AndroidRuntime(15497): Process: com.google.android.gm, PID: 15497

E/AndroidRuntime(15497): java.lang.SecurityException: Permission Denial: reading com.android.providers.downloads.DownloadProvider uri content://downloads/all_downloads/73 from pid=15497, uid=10016 requires android.permission.ACCESS_ALL_DOWNLOADS, or grantUriPermission()

E/AndroidRuntime(15497):	at android.os.Parcel.readException(Parcel.java:1548)

E/AndroidRuntime(15497):	at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:185)

E/AndroidRuntime(15497):	at android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(DatabaseUtils.java:148)

E/AndroidRuntime(15497):	at android.content.ContentProviderProxy.openTypedAssetFile(ContentProviderNative.java:691)

E/AndroidRuntime(15497):	at android.content.ContentResolver.openTypedAssetFileDescriptor(ContentResolver.java:1080)

E/AndroidRuntime(15497):	at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:921)

E/AndroidRuntime(15497):	at android.content.ContentResolver.openFileDescriptor(ContentResolver.java:778)

E/AndroidRuntime(15497):	at android.content.ContentResolver.openFileDescriptor(ContentResolver.java:733)

E/AndroidRuntime(15497):	at android.app.DownloadManager.openDownloadedFile(DownloadManager.java:1040)

E/AndroidRuntime(15497):	at ene.a(SourceFile:636)

E/AndroidRuntime(15497):	at ene.a(SourceFile:439)

E/AndroidRuntime(15497):	at com.google.android.gm.job.DownloadCompleteJob.a(SourceFile:40)

E/AndroidRuntime(15497):	at eks.run(Unknown Source)

E/AndroidRuntime(15497):	at android.os.Handler.handleCallback(Handler.java:739)

E/AndroidRuntime(15497):	at android.os.Handler.dispatchMessage(Handler.java:95)

E/AndroidRuntime(15497):	at android.os.Looper.loop(Looper.java:135)

E/AndroidRuntime(15497):	at android.os.HandlerThread.run(HandlerThread.java:61)

It appears that com.google.android.gm doesn't have the permissions it needs (ACCESS_ALL_DOWNLOADS), so I tried to grant this permission with:

adb shell pm grant com.google.android.gm android.permission.ACCESS_ALL_DOWNLOADS

but I got:

Operation not allowed: java.lang.SecurityException: Package com.google.android.gm has not requested permission android.permission.ACCESS_ALL_DOWNLOADS