iOS File Chooser error

iOS File Chooser error

[INFO   ] [Text        ] Provider: sdl2
 Traceback (most recent call last):
   File "/Users/richard/Repos/btp/kivy-ios/filechooser-ios/YourApp/main.py", line 33, in <module>
   File "/Users/richard/Library/Developer/CoreSimulator/Devices/E5F90713-0057-4F0B-A728-F6F27038B40F/data/Containers/Bundle/Application/92050856-4497-4BC8-B4B8-B32D77D6567A/filechooser.app/lib/python3.7/site-packages/kivy/app.py", line 949, in run
     self._run_prepare()
   File "/Users/richard/Library/Developer/CoreSimulator/Devices/E5F90713-0057-4F0B-A728-F6F27038B40F/data/Containers/Bundle/Application/92050856-4497-4BC8-B4B8-B32D77D6567A/filechooser.app/lib/python3.7/site-packages/kivy/app.py", line 944, in _run_prepare
     self.dispatch('on_start')
   File "kivy/_event.pyx", line 709, in kivy._event.EventDispatcher.dispatch
   File "/Users/richard/Repos/btp/kivy-ios/filechooser-ios/YourApp/main.py", line 18, in on_start
   File "pyobjus/pyobjus.pyx", line 740, in pyobjus.pyobjus.autoclass
   File "pyobjus/pyobjus.pyx", line 98, in pyobjus.pyobjus.MetaObjcClass.__new__
   File "pyobjus/pyobjus.pyx", line 129, in pyobjus.pyobjus.MetaObjcClass.resolve_class
 pyobjus.pyobjus.ObjcException: Unable to find class b'NativeImagePicker'
2020-02-07 22:20:01.480265+0200 filechooser[3382:3018642] Application quit abnormally!
2020-02-07 22:20:01.502773+0200 filechooser[3382:3018642] Leaving