Web gui not showing after updating python

Hi,
Yesterday I updated python and since then I cannot get the web gui to work.
I am running it in Hassbian, in a Raspberry Pi 3B+.
Home assistant service is active, by the way, and the log shows this:

Jul 19 15:19:00 hassbian systemd[1]: Started Home Assistant for homeassistant.
Jul 19 15:19:09 hassbian hass[561]: 2019-07-19 15:19:09 INFO (MainThread) [homeassistant.core] Starting Home Assistant
Jul 19 15:19:09 hassbian hass[561]: 2019-07-19 15:19:09 ERROR (MainThread) [homeassistant.core] Error doing job: Task exception was never retrieved
Jul 19 15:19:09 hassbian hass[561]: Traceback (most recent call last):
Jul 19 15:19:09 hassbian hass[561]:   File "/srv/homeassistant/lib/python3.7/site-packages/homeassistant/core.py", line 1127, in async_call
Jul 19 15:19:09 hassbian hass[561]:     raise ServiceNotFound(domain, service) from None
Jul 19 15:19:09 hassbian hass[561]: homeassistant.exceptions.ServiceNotFound: Unable to find service persistent_notification/create
Jul 19 15:19:09 hassbian hass[561]: 2019-07-19 15:19:09 INFO (MainThread) [homeassistant.core] Timer:starting

I am really noob with this, so any help would be appreciated!

How did you upgrade Python?

With ´sudo hassbian-config upgrade python --force´
Shouldn’t have done that?

Maybe this can help:

I tried both options, and they didn’t work…

I have no idea what I did, but it is working now.
I just updated everything many times and it finally worked.
Thank you for your help.