I think what you want is,
{vb:raw prepared.userid} instead of
{vb:raw user.userid}
On a side note, the error Warning: fetch_template, is being caused by this line in the XML:
Code:
$vbulletin->templatecache['memberinfo_block_ministats'] = str_replace($rui_button,fetch_template('report_user_info_button'),$vbulletin->templatecache['memberinfo_block_ministats'].$rui_button);
How to fix, off the top of my head I am not sure, have not installed the mod myself.