Access not recognized: "Error"

Hi !

Yesterday, I created my website called metamorfosidellavita.com and all worked really well. I installed the files into the root, I did install WordPress on it, and login with my username and password.

But, all of a sudden, on the main page of the admin-panel, I think I change something and save it. I remember that there was the same adress for the Wodpress site and my own website. Now then I think about it, I don’t remember to have changed something.

Here a screenshot: […]

I really, really could use some help.

Thank you !

PS: Sorry for my English, I’m French.