<?php

include("./global.php");

if (!$bbuserinfo[usergroupid]==7 || $bbuserinfo[usergroupid]==6 || $bbuserinfo[usergroupid]==5 || $bbuserinfo[usergroupid]==7) {
eval("dooutput(\"".gettemplate('chatmod')."\");");
} else {
if( $bbuserid ) {

$user = $DB_site->query_first( "SELECT username
FROM user
WHERE userid = $bbuserid" );
$bbusername = $user[ username ];
eval("dooutput(\"".gettemplate('chat')."\");");
} else {
eval("dooutput(\"".show_nopermission()."\");");

} // end if
} // end else

?>

You forgot to close the else statement in line 8.