问为什么会出现buildozer debug和sdl 2错误？

EN

[INFO]:    Downloading sdl2_image
[DEBUG]:   -> running mkdir -p /home/isi/Schreibtisch/Project/.buildozer/android/platform/build-armeabi-v7a/packages/sdl2_image
[INFO]:    -> directory context /home/isi/Schreibtisch/Project/.buildozer/android/platform/build-armeabi-v7a/packages/sdl2_image
[DEBUG]:   -> running basename https://www.libsdl.org/projects/SDL_image/release/SDL2_image-2.0.4.tar.gz
[DEBUG]:    SDL2_image-2.0.4.tar.gz
[DEBUG]:   Downloading sdl2_image from https://www.libsdl.org/projects/SDL_image/release/SDL2_image-2.0.4.tar.gz
[DEBUG]:   -> running rm -f .mark-SDL2_image-2.0.4.tar.gz
[INFO]:    Downloading sdl2_image from https://www.libsdl.org/projects/SDL_image/release/SDL2_image-2.0.4.tar.gz
Traceback (most recent call last):
  File "/usr/lib/python3.8/urllib/request.py", line 1354, in do_open
    h.request(req.get_method(), req.selector, req.data, headers,
  File "/usr/lib/python3.8/http/client.py", line 1252, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/lib/python3.8/http/client.py", line 1298, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.8/http/client.py", line 1247, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.8/http/client.py", line 1007, in _send_output
    self.send(msg)
  File "/usr/lib/python3.8/http/client.py", line 947, in send
    self.connect()
  File "/usr/lib/python3.8/http/client.py", line 1414, in connect
    super().connect()
  File "/usr/lib/python3.8/http/client.py", line 918, in connect
    self.sock = self._create_connection(
  File "/usr/lib/python3.8/socket.py", line 808, in create_connection
    raise err
  File "/usr/lib/python3.8/socket.py", line 796, in create_connection
    sock.connect(sa)
OSError: [Errno 101] Network is unreachable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.8/runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.8/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/home/isi/Schreibtisch/Project/.buildozer/android/platform/python-for-android/pythonforandroid/toolchain.py", line 1276, in <module>
    main()
  File "/home/isi/Schreibtisch/Project/.buildozer/android/platform/python-for-android/pythonforandroid/entrypoints.py", line 18, in main
    ToolchainCL()
  File "/home/isi/Schreibtisch/Project/.buildozer/android/platform/python-for-android/pythonforandroid/toolchain.py", line 725, in __init__
    getattr(self, command)(args)
  File "/home/isi/Schreibtisch/Project/.buildozer/android/platform/python-for-android/pythonforandroid/toolchain.py", line 153, in wrapper_func
    build_dist_from_args(ctx, dist, args)
  File "/home/isi/Schreibtisch/Project/.buildozer/android/platform/python-for-android/pythonforandroid/toolchain.py", line 212, in build_dist_from_args
    build_recipes(build_order, python_modules, ctx,
  File "/home/isi/Schreibtisch/Project/.buildozer/android/platform/python-for-android/pythonforandroid/build.py", line 558, in build_recipes
    recipe.download_if_necessary()
  File "/home/isi/Schreibtisch/Project/.buildozer/android/platform/python-for-android/pythonforandroid/recipe.py", line 362, in download_if_necessary
    self.download()
  File "/home/isi/Schreibtisch/Project/.buildozer/android/platform/python-for-android/pythonforandroid/recipe.py", line 412, in download
    self.download_file(self.versioned_url, filename)
  File "/home/isi/Schreibtisch/Project/.buildozer/android/platform/python-for-android/pythonforandroid/recipe.py", line 218, in download_file
    urlretrieve(url, target, report_hook)
  File "/usr/lib/python3.8/urllib/request.py", line 247, in urlretrieve
    with contextlib.closing(urlopen(url, data)) as fp:
  File "/usr/lib/python3.8/urllib/request.py", line 222, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib/python3.8/urllib/request.py", line 525, in open
    response = self._open(req, data)
  File "/usr/lib/python3.8/urllib/request.py", line 542, in _open
    result = self._call_chain(self.handle_open, protocol, protocol +
  File "/usr/lib/python3.8/urllib/request.py", line 502, in _call_chain
    result = func(*args)
  File "/usr/lib/python3.8/urllib/request.py", line 1397, in https_open
    return self.do_open(http.client.HTTPSConnection, req,
  File "/usr/lib/python3.8/urllib/request.py", line 1357, in do_open
    raise URLError(err)
urllib.error.URLError: <urlopen error [Errno 101] Network is unreachable>
Download failed: <urlopen error [Errno 101] Network is unreachable>; retrying in 1 second(s)...Download failed: <urlopen error [Errno 101] Network is unreachable>; retrying in 2 second(s)...Download failed: <urlopen error [Errno 101] Network is unreachable>; retrying in 4 second(s)...Download failed: <urlopen error [Errno 101] Network is unreachable>; retrying in 8 second(s)...# Command failed: /usr/bin/python3 -m pythonforandroid.toolchain create --dist_name=myapp --bootstrap=sdl2 --requirements=python3,kivy --arch armeabi-v7a --copy-libs --color=always --storage-dir="/home/isi/Schreibtisch/Project/.buildozer/android/platform/build-armeabi-v7a" --ndk-api=21 --ignore-setup-py --debug