Help with scraping

Hey guys,

please, i need help with the scraping add on from home assistant. I think, i’m to stupid to resolve it. Can you give me an example, how i can read the following parameter from my heating system?

When i call the site:

i get the following view:

Now i call in HA the scrape addon, put the link inside the form and click on next. Then i have to configure the sensor…and now all what i do is not working…for example the hot water temp:

But the result is only “unknown”… PS: For the page self no login is required.