android: Mobile app notification does not work

Home Assistant Android version: 1.8.0-144 Android version: 10 Phone model: Galaxy S10+ Home Assistant version: 0.107.4 Last working Home Assistant release (if known):

Description of problem: When trying to send a notification to mobile app using the notify.mobile_app_** service from the developer tools I get the below error.

Traceback (if applicable):

hass         | 2020-03-21 22:37:32 ERROR (MainThread) [homeassistant.components.websocket_api.http.connection.2961320208] 0, message='Attempt to decode JSON with unexpected mimetype: text/html; charset=utf-8', url='https://mobile-apps.home-assistant.io/api/sendPush/android/v1
hass         | Traceback (most recent call last):
hass         |   File "/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py", line 134, in handle_call_service
hass         |     connection.context(msg),
hass         |   File "/usr/src/homeassistant/homeassistant/core.py", line 1234, in async_call
hass         |     await asyncio.shield(self._execute_service(handler, service_call))
hass         |   File "/usr/src/homeassistant/homeassistant/core.py", line 1257, in _execute_service
hass         |     await handler.func(service_call)
hass         |   File "/usr/src/homeassistant/homeassistant/components/notify/__init__.py", line 119, in async_notify_message
hass         |     await notify_service.async_send_message(**kwargs)
hass         |   File "/usr/src/homeassistant/homeassistant/components/mobile_app/notify.py", line 135, in async_send_message
hass         |     result = await response.json()
hass         |   File "/usr/local/lib/python3.7/site-packages/aiohttp/client_reqrep.py", line 1031, in json
hass         |     headers=self.headers)

Screenshot of problem:

Additional information: