a few quick fixes

libraries/BBcodeDefinitions/User.php

@@ -10,7 +10,7 @@ namespace Sakura\BBcodeDefinitions;
 use JBBCode\CodeDefinition;
 use JBBCode\ElementNode;
 use Sakura\Router;
-use Sakura\User;
+use Sakura\User as SakuraUser;
 use Sakura\Utils;
 
 /**
@@ -47,7 +47,7 @@ class User extends CodeDefinition
             $content .= Utils::cleanString($child->getAsText(), true);
         }
 
-        $user = User::construct($content);
+        $user = SakuraUser::construct($content);
         $profile = Router::route('user.profile', $user->id);
 
         return "<a class='default username' href='{$profile} style='color: {$user->colour};

libraries/Controllers/ForumController.php

@@ -106,7 +106,9 @@ class ForumController extends Controller
             ->orderByRaw('COUNT(*) DESC')
             ->limit(1)
             ->get(['poster_id']);
-        $activePoster = User::construct($activePosterId[0]->poster_id);
+        $activePoster = User::construct(
+            $activePosterId ? $activePosterId[0]->poster_id : 0
+        );
 
         // Create the forum object
         $forum = new Forum;

libraries/User.php

@@ -1084,8 +1084,8 @@ class User
             ->insert([
                 'change_time' => time(),
                 'user_id' => $this->id,
-                'username_new_clean' => $username,
-                'new_clean' => $username_clean,
+                'username_new' => $username,
+                'username_new_clean' => $username_clean,
                 'username_old' => $this->username,
                 'username_old_clean' => $this->usernameClean,
             ]);

templates/yuuno/forum/index.twig

@@ -45,6 +45,7 @@
             </div>
             <div id="forumMostActivePoster">
                 <div class="head">Today's most active poster</div>
+                {% if not activePoster.id %}
                     <a class="clean" href="{{ route('user.profile', activePoster.id) }}">
                         <div class="user-container" style="background-image: url({{ route('user.header', activePoster.id) }});">
                             <div class="default-avatar-setting user-container-avatar" style="background-image: url({{ route('file.avatar', activePoster.id) }}); box-shadow: 0 0 5px #{% if activePoster.isOnline %}484{% else %}844{% endif %};"></div>
@@ -54,6 +55,9 @@
                             </div>
                         </div>
                     </a>
+                {% else %}
+                    <h1 class="stylised" style="margin: 1em 0; text-align: center;">No one yet!</h1>
+                {% endif %}
             </div>
         </div>
         <div class="content-left content-column">