Multiscrape data from KNV heatpump

Hi there,

I’m a pretty new user with little experience how to get integrations or small automations running over the last months.
However yaml is a green field for me and I don’t have any idea how to „debug“ something in homeassistant…

I want to get the data for warmwater and outside temperature via scraping (multiscrape) from the heatpump, which i can access over the local network.
With multiscrape i manage to get values from the heatpump-login page. But i don’t get any values from the „logged in“-page and i have to clue if there is a problem with the login submit form or maybe the css selector.
I use the firefox built-in css selector…

Here is my multiscrape code so far

- resource:!/home
#  scan_intervall: 900
    submit_once: True
      username: user
      password: user
    - unique_id: ww_temp
      name: WW Temp
      select: " > div:nth-child(1) > div:nth-child(3) > div:nth-child(1) > h4:nth-child(1)"
  log_response: true

And here the codes from the website (i am only allowed to post one picture)
(left: “login”-page … right: “logged in”-page)

Can you tell me where my problem is or where I have to look at?

Thanks in advance.