Error loading img from URL

[prxy15]

#qpy:kivy
import os
from kivy.app import App
from kivy.uix.image import Image, AsyncImage
from kivy.loader import Loader
class TestApp(App):
    def build(self):
        img = AsyncImage(source = "https://upload.wikimedia.org/wikipedia/commons/thumb/4/49/Opera_2015_icon.svg/400px-Opera_2015_icon.svg.png")
        
TestApp().run()

and log:

[Feedback]: 

[Device information]
RNE-L03,android:7.0,sdk:24 

[Recent error information]


[Or write your feedback here]: 
[INFO ] [Kivy ] v1.10.0
[INFO ] [Python ] v2.7.12 (default, Nov 21 2017, 21:49:35) 
[GCC 4.9.x 20150123 (prerelease)]
[INFO ] [Factory ] 194 symbols loaded
[INFO ] [Image ] Providers: img_tex, img_dds, img_pygame, img_pil, img_gif (img_ffpyplayer ignored)
[INFO ] [Loader ] using a thread pool of 2 workers
[INFO ] [Window ] Provider: pygame
[INFO ] [GL ] Using the "OpenGL ES 2" graphics system
[INFO ] [GL ] Backend used <gl>
[INFO ] [GL ] OpenGL version <OpenGL ES 3.2 v1.r12p1-04bet0.b125fee3fb58301c951089b9a402d362>
[INFO ] [GL ] OpenGL vendor <ARM>
[INFO ] [GL ] OpenGL renderer <Mali-T830>
[INFO ] [GL ] OpenGL parsed version: 3, 2
[INFO ] [GL ] Texture max size <8192>
[INFO ] [GL ] Texture max units <16>
Traceback (most recent call last):
File "/data/user/0/org.qpython.qpy/files/lib/python27.zip/logging/__init__.py", line 882, in emit
stream.write(fs % msg)
File "<string>", line 23, in write
TypeError: argument 1 must be string without null bytes, not str
Logged from file __init__.py, line 1051
[ERROR ] [Shader ] GL error 1281
[INFO ] [Support ] Android install hooks
[INFO ] [Window ] virtual keyboard not allowed, single mode, not docked
Traceback (most recent call last):
File "windowprpvider.py", line 13, in <module>
TestApp().run()
File "/data/user/0/org.qpython.qpy/files/lib/python2.7/site-packages/kivy_u4_qpython-1.10.0-py2.7.egg/kivy/app.py", line 802, in run
root = self.build()
File "windowprpvider.py", line 11, in build
img = AsyncImage(source = "https://upload.wikimedia.org/wikipedia/commons/thumb/4/49/Opera_2015_icon.svg/400px-Opera_2015_icon.svg.png";)
File "/data/user/0/org.qpython.qpy/files/lib/python2.7/site-packages/kivy_u4_qpython-1.10.0-py2.7.egg/kivy/uix/image.py", line 345, in __init__
self._load_source()
File "/data/user/0/org.qpython.qpy/files/lib/python2.7/site-packages/kivy_u4_qpython-1.10.0-py2.7.egg/kivy/uix/image.py", line 360, in _load_source
anim_delay=self.anim_delay)
File "/data/user/0/org.qpython.qpy/files/lib/python2.7/site-packages/kivy_u4_qpython-1.10.0-py2.7.egg/kivy/loader.py", line 448, in image
client = ProxyImage(self.loading_image,
File "/data/user/0/org.qpython.qpy/files/lib/python2.7/site-packages/kivy_u4_qpython-1.10.0-py2.7.egg/kivy/loader.py", line 168, in _get_loading_image
self._loading_image = ImageLoader.load(filename=loading_png_fn)
File "/data/user/0/org.qpython.qpy/files/lib/python2.7/site-packages/kivy_u4_qpython-1.10.0-py2.7.egg/kivy/core/image/__init__.py", line 435, in load
im = loader(filename, **kwargs)
File "/data/user/0/org.qpython.qpy/files/lib/python2.7/site-packages/kivy_u4_qpython-1.10.0-py2.7.egg/kivy/core/image/__init__.py", line 201, in __init__
self._data = self.load(filename)
File "/data/user/0/org.qpython.qpy/files/lib/python2.7/site-packages/kivy_u4_qpython-1.10.0-py2.7.egg/kivy/core/image/img_pil.py", line 101, in load
return list(self._img_read(im))
File "/data/user/0/org.qpython.qpy/files/lib/python2.7/site-packages/kivy_u4_qpython-1.10.0-py2.7.egg/kivy/core/image/img_pil.py", line 86, in _img_read
img_tmp.mode.lower(), img_tmp.tobytes())
File "/data/user/0/org.qpython.qpy/files/lib/python2.7/site-packages/PIL_u4_qpython-1.1.7-py2.7.egg/PIL/Image.py", line 512, in __getattr__
raise AttributeError(name)
AttributeError: tobytes