The new legend you added is correct. But I think you accidentally changed something else and that is causing the tests to fail. For example, I don’t see the cat photo URL input below the fieldset.
I would restart the step to get the original HTML back and then add your legend again, making sure not to change anything else.
i tried to I would restart the step to get the original HTML back
by reload the webpage. but it stays. maybe i need restart Firefox? or how i could restart this ?