A short time ago I had a forum with the winboxphone.com, now this domain has not been renewed and I don't use it anymore,

I went to vbulletin official and in my customer area I changed the url from winboxphone.com to winboxphone.it

now I'm trying to install vbulletin 5.5.5 but it gives me an error as in the screenshot attached.

i doubt about this

I noticed that in this guide
it says to rename the config.php.bkp file in config.php and then open it and edit this string
$ config ['baseurl'] = 'http://www.yourdomain.com/folder';
but when i rename the file and open it this string doesn't exist, maybe that's why it gives me url error, I don't know.

do you have any advice to give me?