```
2020-08-07 22:38:10 ERROR (MainThread) [homeassistant.components.websocket_api.http.connection.3903193064] local variable 'response' referenced before assignment
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/components/rest_command/__init__.py", line 115, in async_service_handler
async with getattr(websession, method)(
File "/usr/local/lib/python3.8/site-packages/aiohttp/client.py", line 1012, in __aenter__
self._resp = await self._coro
File "/usr/local/lib/python3.8/site-packages/aiohttp/client.py", line 582, in _request
break
File "/usr/local/lib/python3.8/site-packages/aiohttp/helpers.py", line 586, in __exit__
raise asyncio.TimeoutError from None
asyncio.exceptions.TimeoutError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py", line 125, in handle_call_service
await hass.services.async_call(
File "/usr/src/homeassistant/homeassistant/core.py", line 1281, in async_call
task.result()
File "/usr/src/homeassistant/homeassistant/core.py", line 1316, in _execute_service
await handler.func(service_call)
File "/usr/src/homeassistant/homeassistant/components/rest_command/__init__.py", line 137, in async_service_handler
_LOGGER.warning("Timeout call %s", response.url, exc_info=1)
UnboundLocalError: local variable 'response' referenced before assignment
```
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