# Buggy code
async def async_mute_volume(self, mute):
    """Mute the volume.

    Since we can't actually mute, we'll:
    - On mute, store volume and set volume to 0
    - On unmute, set volume to previously stored volume
    """
    if not self.available:
        return

    self._media_is_muted = mute
    if mute:
        self._previous_volume = self.volume_level
        await self.alexa_api.set_volume(0)
    else:
        if self._previous_volume is not None:
            await self.alexa_api.set_volume(self._previous_volume)
        else:
            await self.alexa_api.set_volume(50)
    if not (
        self.hass.data[DATA_ALEXAMEDIA]["accounts"][self._login.email]["websocket"]
    ):
        await self.async_update()


# Traceback (RuntimeError)
2020-06-21 12:36:29 ERROR (MainThread) [alexapy.helpers] alexaapi.get_state((<alexapy.alexaapi.AlexaAPI object at 0xa8cddbd0>,), {}): An error occured accessing AlexaAPI: An exception of type RuntimeError occurred. Arguments:
('Session is closed',)
2020-06-21 12:36:29 ERROR (MainThread) [homeassistant.util.logging] Exception in _handle_event when dispatching 'alexa_media_a******e@g*******m': ({'player_state': {'destinationUserId': 'XXX', 'dopplerId': {'deviceType': 'AB72C64C86AW2', 'deviceSerialNumber': 'XXX'}, 'audioPlayerState': 'PLAYING', 'quality': None, 'error': False, 'errorMessage': None, 'mediaReferenceId': '78e56ac3-4ab4-4c85-86b4-3d9bb3f5ae60:6'}},)
Traceback (most recent call last):
File "/config/custom_components/alexa_media/media_player.py", line 369, in _handle_event
await self.async_update()
File "/config/custom_components/alexa_media/helpers.py", line 148, in wrapper
result = await func(*args, **kwargs)
File "/config/custom_components/alexa_media/media_player.py", line 802, in async_update
device, no_throttle=True
File "/config/custom_components/alexa_media/helpers.py", line 148, in wrapper
result = await func(*args, **kwargs)
File "/config/custom_components/alexa_media/media_player.py", line 545, in refresh
session = await self.alexa_api.get_state()
File "/usr/local/lib/python3.7/site-packages/alexapy/helpers.py", line 69, in wrapper
return await func(*args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/alexapy/alexaapi.py", line 761, in get_state
+ "&amp;screenWidth=2560"
File "/usr/local/lib/python3.7/site-packages/alexapy/alexaapi.py", line 122, in _get_request
return await self._request("get", uri, data)
File "/usr/local/lib/python3.7/site-packages/backoff/_async.py", line 133, in retry
ret = await target(*args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/alexapy/alexaapi.py", line 93, in _request
ssl=self._login._ssl,
File "/usr/local/lib/python3.7/site-packages/alexapy/aiohttp/client.py", line 377, in _request
raise RuntimeError("Session is closed")
RuntimeError: Session is closed

# Fixed code
async def async_mute_volume(self, mute):
    """Mute the volume.

    Since we can't actually mute, we'll:
    - On mute, store volume and set volume to 0
    - On unmute, set volume to previously stored volume
    """
    self.check_login_changes()
    if not self.available:
        return

    self._media_is_muted = mute
    if mute:
        self._previous_volume = self.volume_level
        await self.alexa_api.set_volume(0)
    else:
        if self._previous_volume is not None:
            await self.alexa_api.set_volume(self._previous_volume)
        else:
            await self.alexa_api.set_volume(50)
    if not (
        self.hass.data[DATA_ALEXAMEDIA]["accounts"][self._login.email]["websocket"]
    ):
        await self.async_update()