I had to set the permissions using command line at the /uploads/dokuwiki level
chown nobody * -R
and it worked.
The other problem that I had was with the created URL. My rewrite on didn't work, and Dokuwiki was creating weird URL with forward slashes, that the browser couldn't accept.
After changing "userwrite" to 0 in /conf/dokuwiki.php:
$conf['userewrite'] = 0; //this makes nice URLs: 0: off 1: .htaccess 2: internal
it started to create URL like:
which the browser was accepting.
From Ohio, USA