hi i mistakenly upgraded wordpress to 2.91and now i have a scrolling width.Please how can i make to stop scrolling.
Some information is needed, like a URL where we can see what might be causing the page to break.
Are you using the default or classic themes that come with WordPress? AFAIK that's the only place new CSS/layout might be coming from. But as kohoutek said, a URL would be a big help.
Possibly one of your plugins is not working and it is spitting out a PHP error that is not wrapping and is causing the scrollbar? Though as kohoutek says, a link to the site will prove most helpful