diff --git a/.github/workflows/codeception-min-version.yml b/.github/workflows/codeception-min-version.yml
index efb2aa71..8826b231 100644
--- a/.github/workflows/codeception-min-version.yml
+++ b/.github/workflows/codeception-min-version.yml
@@ -13,3 +13,4 @@ jobs:
     with:
       module-id: polls
       use-rest-module: true
+      rest-module-branch: develop
diff --git a/Events.php b/Events.php
index 88479d04..cd38faf1 100644
--- a/Events.php
+++ b/Events.php
@@ -143,8 +143,7 @@ public static function onSampleDataInstall($event)
 
         $comment = new \humhub\modules\comment\models\Comment();
         $comment->message = Yii::t('PollsModule.base', "Why don't we go to Bemelmans Bar?");
-        $comment->object_model = $poll->className();
-        $comment->object_id = $poll->getPrimaryKey();
+        $comment->content_id = $poll->content->id;
         $comment->save();
 
         // Switch Identity
@@ -155,8 +154,7 @@ public static function onSampleDataInstall($event)
 
         $comment = new \humhub\modules\comment\models\Comment();
         $comment->message = Yii::t('PollsModule.base', "Again? :weary:");
-        $comment->object_model = $poll->className();
-        $comment->object_id = $poll->getPrimaryKey();
+        $comment->content_id = $poll->content->id;
         $comment->save();
 
         // Switch Identity
diff --git a/Module.php b/Module.php
index e142827e..2090e513 100644
--- a/Module.php
+++ b/Module.php
@@ -2,7 +2,6 @@
 
 namespace humhub\modules\polls;
 
-use humhub\components\console\Application as ConsoleApplication;
 use humhub\modules\user\models\User;
 use humhub\modules\polls\models\Poll;
 use humhub\modules\space\models\Space;
@@ -26,19 +25,6 @@ class Module extends ContentContainerModule
      */
     public $resourcesPath = 'resources';
 
-    /**
-     * @inheritdoc
-     */
-    public function init()
-    {
-        parent::init();
-
-        if (Yii::$app instanceof ConsoleApplication) {
-            // Prevents the Yii HelpCommand from crawling all web controllers and possibly throwing errors at REST endpoints if the REST module is not available.
-            $this->controllerNamespace = 'polls/commands';
-        }
-    }
-
     /**
      * @inheritdoc
      */
diff --git a/activities/NewVote.php b/activities/NewVote.php
index f9466b11..6c38f3fd 100644
--- a/activities/NewVote.php
+++ b/activities/NewVote.php
@@ -1,43 +1,29 @@
 <?php
 
-/**
- * @link https://www.humhub.org/
- * @copyright Copyright (c) 2015 HumHub GmbH & Co. KG
- * @license https://www.humhub.com/licences
- */
-
 namespace humhub\modules\polls\activities;
 
-use humhub\modules\activity\components\BaseActivity;
+use humhub\modules\activity\components\BaseContentActivity;
 use humhub\modules\activity\interfaces\ConfigurableActivityInterface;
 use Yii;
 
-class NewVote extends BaseActivity implements ConfigurableActivityInterface
+class NewVote extends BaseContentActivity implements ConfigurableActivityInterface
 {
-    /**
-     * @inheritdoc
-     */
-    public $moduleId = 'polls';
-
-    /**
-     * @inheritdoc
-     */
-    public $viewName = 'newVote';
-
-    /**
-     * @inheritdoc
-     */
-    public function getTitle()
+    public static function getTitle(): string
     {
         return Yii::t('PollsModule.base', 'Polls');
     }
 
-    /**
-     * @inheritdoc
-     */
-    public function getDescription()
+    public static function getDescription(): string
     {
         return Yii::t('PollsModule.base', 'Whenever someone participates in a poll.');
     }
 
+    protected function getMessage(array $params): string
+    {
+        // Backward compatibility of translation placeholders
+        $params['userName'] = $params['displayName'];
+        $params['question'] = $params['contentTitle'];
+
+        return Yii::t('PollsModule.base', '{userName} answered the {question}.', $params);
+    }
 }
diff --git a/activities/views/newVote.php b/activities/views/newVote.php
deleted file mode 100644
index 50689b92..00000000
--- a/activities/views/newVote.php
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php
-
-use humhub\helpers\Html;
-
-echo Yii::t('PollsModule.base', '{userName} answered the {question}.', [
-    '{userName}' => '<strong>' . Html::encode($originator->displayName) . '</strong>',
-    '{question}' => $this->context->getContentInfo($source)
-]);
-?>
diff --git a/controllers/PollController.php b/controllers/PollController.php
index 051adc33..347d4814 100644
--- a/controllers/PollController.php
+++ b/controllers/PollController.php
@@ -6,7 +6,7 @@
 use humhub\modules\polls\models\Poll;
 use humhub\modules\polls\models\PollAnswer;
 use humhub\modules\polls\widgets\WallCreateForm;
-use humhub\modules\stream\actions\Stream;
+use humhub\modules\stream\actions\StreamEntryResponse;
 use humhub\modules\user\models\User;
 use humhub\modules\user\widgets\UserListBox;
 use humhub\helpers\Html;
@@ -67,7 +67,7 @@ public function actionReload($id)
             throw new HttpException(403);
         }
 
-        return $this->asJson(Stream::getContentResultEntry($model->content));
+        return $this->asJson(StreamEntryResponse::getAsArray($model->content));
     }
 
     public function actionEdit()
@@ -95,7 +95,7 @@ public function actionEdit()
             if ($model->validate() && $model->save()) {
                 // Reload record to get populated updated_at field
                 $model = Poll::findOne(['id' => $id]);
-                return Stream::getContentResultEntry($model->content);
+                return StreamEntryResponse::getAsArray($model->content);
             } else {
                 $result['errors'] = $model->getErrors();
             }
@@ -131,7 +131,7 @@ public function setClosed($id, $closed)
         // Refresh updated_at
         $model->content->refresh();
 
-        return Stream::getContentResultEntry($model->content);
+        return StreamEntryResponse::getAsArray($model->content);
     }
 
     /**
@@ -159,7 +159,7 @@ public function actionAnswer()
 
         $poll->vote($votes);
 
-        return Stream::getContentResultEntry($poll->content);
+        return StreamEntryResponse::getAsArray($poll->content);
     }
 
     /**
@@ -169,7 +169,7 @@ public function actionAnswerReset()
     {
         $poll = $this->getPollByParameter();
         $poll->resetAnswer();
-        return $this->asJson(Stream::getContentResultEntry($poll->content));
+        return $this->asJson(StreamEntryResponse::getAsArray($poll->content));
     }
 
     /**
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index eeff39a3..cfae92ef 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,7 +1,15 @@
 Changelog
 =========
 
-1.4.5 (Feburary 27, 2026)
+1.5.1 (July 23, 2026)
+---------------------
+- Fix #175: Error creating installer sample content (comment no longer uses removed `object_model`/`object_id` properties)
+
+1.5.0 (June 5, 2026)
+--------------------
+- Enh #174: Update for HumHub 1.19
+
+1.4.5 (February 27, 2026)
 -------------------------
 - Fix #173: Alignment on large screens and Enterprise Theme
 
diff --git a/docs/README.md b/docs/README.md
index 8c4f7df3..f8a666f6 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -1,5 +1,3 @@
-[![Test Status](https://github.com/humhub/polls/actions/workflows/php-test-master.yml/badge.svg)](https://github.com/humhub/polls/actions/workflows/php-test-master.yml)
-
 # Polls
 
 Easily create polls with the intuitive Polls Module, simplifying decision-making on your network. Whether you're seeking opinions on urgent matters or aiming for consensus, harness the power of voting to streamline discussions and swiftly resolve disputes.
@@ -10,3 +8,4 @@ Easily create polls with the intuitive Polls Module, simplifying decision-making
 - **Vote Types:** Choose between regular and anonymous voting.
 - **Choices:** Allow your users to select single or multiple options.
 - **Blind Voting:** Keep poll results hidden until it's closed to avoid choice bias.
+
diff --git a/migrations/m150709_151858_namespace.php b/migrations/m150709_151858_namespace.php
index 58d0d3cb..09423509 100644
--- a/migrations/m150709_151858_namespace.php
+++ b/migrations/m150709_151858_namespace.php
@@ -1,15 +1,24 @@
 <?php
 
-use yii\db\Schema;
+use humhub\modules\polls\models\Poll;
 use humhub\components\Migration;
 
 class m150709_151858_namespace extends Migration
 {
     public function up()
     {
-        $this->renameClass('Poll', humhub\modules\polls\models\Poll::className());
-        $this->update('activity', ['class' => 'humhub\modules\content\activities\ContentCreated', 'module' => 'content'], ['class' => 'PollCreated']);
-        $this->update('activity', ['class' => 'humhub\modules\polls\activities\NewVote', 'module' => 'polls'], ['class' => 'PollAnswered']);
+        $this->renameClass('Poll', Poll::class);
+
+        $table = $this->db->getTableSchema('activity');
+        $columnsContentCreated = ['class' => 'humhub\modules\content\activities\ContentCreated'];
+        $columnsNewVote = ['class' => 'humhub\modules\polls\activities\NewVote'];
+        if (isset($table->columns['module'])) {
+            $columnsContentCreated['module'] = 'content';
+            $columnsNewVote['module'] = 'polls';
+        }
+
+        $this->update('activity', $columnsContentCreated, ['class' => 'PollCreated']);
+        $this->update('activity', $columnsNewVote, ['class' => 'PollAnswered']);
     }
 
     public function down()
diff --git a/models/Poll.php b/models/Poll.php
index e43ce5ab..6b05b9bb 100644
--- a/models/Poll.php
+++ b/models/Poll.php
@@ -2,9 +2,10 @@
 
 namespace humhub\modules\polls\models;
 
+use humhub\modules\activity\services\ActivityManager;
 use humhub\modules\content\widgets\richtext\RichText;
+use humhub\modules\polls\activities\NewVote;
 use humhub\modules\polls\permissions\CreatePoll;
-use humhub\modules\search\interfaces\Searchable;
 use humhub\modules\content\components\ContentActiveRecord;
 use Yii;
 
@@ -32,7 +33,7 @@
  * @since 0.5
  * @author Luke
  */
-class Poll extends ContentActiveRecord implements Searchable
+class Poll extends ContentActiveRecord
 {
     public const MIN_REQUIRED_ANSWERS = 2;
     public const SCENARIO_CREATE = 'create';
@@ -309,10 +310,7 @@ public function vote($votes = [])
         }
 
         if ($voted && !$this->anonymous) {
-            $activity = new \humhub\modules\polls\activities\NewVote();
-            $activity->source = $this;
-            $activity->originator = Yii::$app->user->getIdentity();
-            $activity->create();
+            ActivityManager::dispatch(NewVote::class, $this);
         }
 
         return $voted;
diff --git a/module.json b/module.json
index b99eed71..f7e01d67 100644
--- a/module.json
+++ b/module.json
@@ -3,10 +3,9 @@
     "name": "Polls",
     "description": "Easily create polls, streamline decision-making, and harness the power of voting.",
     "keywords": ["poll", "voting", "decision making"],
-    "version": "1.4.5",
+    "version": "1.5.1",
     "humhub": {
-        "minVersion": "1.18.1",
-        "maxVersion": "1.18"
+        "minVersion": "1.19"
     },
     "homepage": "https://github.com/humhub/polls",
     "authors": [
diff --git a/widgets/views/closeButton.php b/widgets/views/closeButton.php
index dc3f2b34..6d4b4d53 100644
--- a/widgets/views/closeButton.php
+++ b/widgets/views/closeButton.php
@@ -1,15 +1,18 @@
+<?php
+
+use humhub\modules\polls\models\Poll;
+use humhub\widgets\bootstrap\Link;
+
+/* @var Poll $poll */
+?>
 <li>
-    <?php if ($poll->closed) : ?>
-        <a class="dropdown-item" href="#" data-action-click="close" data-action-target="[data-poll='<?= $poll->id ?>']" 
-           data-action-url="<?= $poll->content->container->createUrl('/polls/poll/open', ['id' => $poll->id]); ?>">
-            <i class="fa fa-check"></i>
-            <?= Yii::t('PollsModule.base', 'Reopen Poll') ?>
-        </a>
-    <?php else : ?>
-        <a class="dropdown-item" data-action-click="close" data-action-target="[data-poll='<?= $poll->id ?>']" 
-           data-action-url="<?= $poll->content->container->createUrl('/polls/poll/close', ['id' => $poll->id]); ?>">
-            <i class="fa fa-times"></i>
-            <?= Yii::t('PollsModule.base', 'Close Poll') ?>
-        </a>
-    <?php endif; ?>
+    <?= $poll->closed
+        ? Link::to(Yii::t('PollsModule.base', 'Reopen Poll'))
+            ->action('close', $poll->content->container->createUrl('/polls/poll/open', ['id' => $poll->id]), '[data-poll=' . $poll->id . ']')
+            ->icon('check')
+            ->cssClass('dropdown-item')
+        : Link::to(Yii::t('PollsModule.base', 'Close Poll'))
+            ->action('close', $poll->content->container->createUrl('/polls/poll/close', ['id' => $poll->id]), '[data-poll=' . $poll->id . ']')
+            ->icon('times')
+            ->cssClass('dropdown-item') ?>
 </li>
diff --git a/widgets/views/resetButton.php b/widgets/views/resetButton.php
index d5198ffb..e0bf3959 100644
--- a/widgets/views/resetButton.php
+++ b/widgets/views/resetButton.php
@@ -1,8 +1,13 @@
+<?php
+
+use humhub\modules\polls\models\Poll;
+use humhub\widgets\bootstrap\Link;
+
+/* @var Poll $poll */
+?>
 <li>
-    <a class="dropdown-item" href="#" data-action-click="reset"
-       data-action-target="[data-poll='<?= $poll->id ?>']" 
-       data-action-url="<?= $poll->content->container->createUrl('/polls/poll/answer-reset', ['pollId' => $poll->id]); ?>">
-        <i class="fa fa-undo"></i>
-        <?= Yii::t('PollsModule.base', 'Reset my vote') ?>
-    </a>
+    <?= Link::to(Yii::t('PollsModule.base', 'Reset my vote'))
+        ->action('reset', $poll->content->container->createUrl('/polls/poll/answer-reset', ['pollId' => $poll->id]), '[data-poll=' . $poll->id . ']')
+        ->icon('undo')
+        ->cssClass('dropdown-item') ?>
 </li>