Hmmm...you could check the CSS code in the page source. There should be a line like this:
<link rel="stylesheet" type="text/css" href="/lib/exe/css.php?t=dokuwiki&tseed=e96e64818c9a1035da3ab8f6ba45ad30"/>
Follow the link and you will see the CSS code. In that the wrap classes should be included. But I assume the CSS is missing.
Maybe you should fix the problem with the admin functions first. It could be that some permissions are not set properly and who knows what effects that might have.