Cannot decode content-encoding: br

[TheOnlyWayUp]

I was helping out someone today, and this error showed up (isn't the first time I've encountered someone who's gotten this)

C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\site-packages\selenium\webdriver\remote\webdriver.py:443: UserWarning: find_element_by_* commands are deprecated. Please use find_element() instead
  warnings.warn("find_element_by_* commands are deprecated. Please use find_element() instead")
Traceback (most recent call last):
  File "d:\AIBot.py", line 50, in <module>
    bot.run(user1token)
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\client.py", line 649, in run   
    return future.result()
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\client.py", line 628, in runner
    await self.start(*args, **kwargs)
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\client.py", line 591, in start 
    await self.login(token)
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\client.py", line 466, in login 
    data = await state.http.static_login(token.strip())
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\http.py", line 452, in static_login
    await self.startup()
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\http.py", line 207, in startup
    self.user_agent, self.browser_version, self.client_build_number = ua, bv, bn = await utils._get_info(session)
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\utils.py", line 1265, in _get_info
    bn = await _get_build_number(session)
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\utils.py", line 1274, in _get_build_number
    login_page = await login_page_request.text()
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\site-packages\aiohttp\client_reqrep.py", line 1076, in text
    await self.read()
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\site-packages\aiohttp\client_reqrep.py", line 1032, in read
    self._body = await self.content.read()
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\site-packages\aiohttp\streams.py", line 344, in read
    raise self._exception
aiohttp.client_exceptions.ClientPayloadError: 400, message='Can not decode content-encoding: br'
Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x000001A86F88B310>
Traceback (most recent call last):
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 116, in __del__
    self.close()
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 108, in close
    self._loop.call_soon(self._call_connection_lost, None)
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 746, in call_soon
    self._check_closed()
  File "C:\Users\lordz\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 510, in _check_closed
    raise RuntimeError('Event loop is closed')
RuntimeError: Event loop is closed

I've seen multiple people who've had this issue, the solution is to update aiohttp (pip install --upgrade aiohttp) (I also asked them to pip install brotli), the error isn't too clear to most people though, hence, is there a way to handle this error and make it more clear, or is there a way to prevent it from showing up in the first place (using the latest version of aiohttp, for example)?

aio-libs/aiohttp/issues/4491 for reference.

[dolfies]

Uhh...
It shouldn't be accepting br if you don't have brotli installed. What version is this?

[TheOnlyWayUp]

Does the await utils._get_info(session) get information from your API?

[dolfies]

Yeah and it falls back if it's down.

[TheOnlyWayUp]

Looks like it's completely unrelated to the API, but rather something related to aiohttp. As updating aiohttp and installing brotli fixed the issue 🤔

[dolfies]

Nah brotli should be optional.

[TheOnlyWayUp]

Yeah, but I don't understand why aiohttp relays to the API that it accepts br in the first place (through the content-type header when sending from client, I believe), an update fixes it, but aiohttp's current version falls in discord.py-self's requirements.txt.

This is an issue that multiple people have faced, could it be a bug with aiohttp?