diff --git a/src/Module/Admin/Item/Source.php b/src/Module/Admin/Item/Source.php
index f736582fa7..6e917eb16c 100644
--- a/src/Module/Admin/Item/Source.php
+++ b/src/Module/Admin/Item/Source.php
@@ -33,7 +33,7 @@ class Source extends BaseAdmin
 	{
 		parent::content($parameters);
 
-		$guid = basename($_REQUEST['guid'] ?? '') ?: $parameters['guid'];
+		$guid = basename($_REQUEST['guid'] ?? $parameters['guid'] ?? '');
 
 		$source = '';
 		$item_uri = '';
diff --git a/src/Module/Objects.php b/src/Module/Objects.php
index 1658507d50..cbe2e53fe0 100644
--- a/src/Module/Objects.php
+++ b/src/Module/Objects.php
@@ -103,6 +103,10 @@ class Objects extends BaseModule
 
 		if (empty($parameters['activity']) && ($item['gravity'] != GRAVITY_ACTIVITY)) {
 			$activity = ActivityPub\Transmitter::createActivityFromItem($item['id'], true);
+			if (empty($activity['type'])) {
+				throw new HTTPException\NotFoundException();
+			}
+
 			$activity['type'] = $activity['type'] == 'Update' ? 'Create' : $activity['type'];
 
 			// Only display "Create" activity objects here, no reshares or anything else
diff --git a/src/Protocol/ActivityPub/Transmitter.php b/src/Protocol/ActivityPub/Transmitter.php
index 7f5f51c38a..c1443bc331 100644
--- a/src/Protocol/ActivityPub/Transmitter.php
+++ b/src/Protocol/ActivityPub/Transmitter.php
@@ -1003,10 +1003,10 @@ class Transmitter
 	 * @param integer $item_id
 	 * @param boolean $object_mode Is the activity item is used inside another object?
 	 *
-	 * @return array of activity
+	 * @return false|array
 	 * @throws \Exception
 	 */
-	public static function createActivityFromItem($item_id, $object_mode = false)
+	public static function createActivityFromItem(int $item_id, bool $object_mode = false)
 	{
 		Logger::info('Fetching activity', ['item' => $item_id]);
 		$item = Item::selectFirst([], ['id' => $item_id, 'parent-network' => Protocol::NATIVE_SUPPORT]);
diff --git a/view/theme/vier/theme.php b/view/theme/vier/theme.php
index b57d7dc1c3..4d11b1cd46 100644
--- a/view/theme/vier/theme.php
+++ b/view/theme/vier/theme.php
@@ -25,7 +25,10 @@ function vier_init(App $a)
 
 	Renderer::setActiveTemplateEngine('smarty3');
 
-	if (!empty($a->argv[0]) && ($a->argv[0] . ($a->argv[1] ?? '')) === ('profile' . ($a->user['nickname'] ?? '')) || $a->argv[0] === 'network' && local_user()) {
+	$args = DI::args();
+
+	if ($args->get(0) === 'profile' && $args->get(1) === ($a->user['nickname'] ?? '') || $args->get(0) === 'network' && local_user()
+	) {
 		vier_community_info();
 
 		DI::page()['htmlhead'] .= "<link rel='stylesheet' type='text/css' href='view/theme/vier/wide.css' media='screen and (min-width: 1300px)'/>\n";
@@ -77,7 +80,7 @@ EOT;
 
 	// Hide the left menu bar
 	/// @TODO maybe move this static array out where it should belong?
-	if (empty(DI::page()['aside']) && in_array($a->argv[0], ["community", "events", "help", "delegation", "notifications",
+	if (empty(DI::page()['aside']) && in_array($args->get(0), ["community", "events", "help", "delegation", "notifications",
 			"probe", "webfinger", "login", "invite", "credits"])) {
 		DI::page()['htmlhead'] .= "<link rel='stylesheet' href='view/theme/vier/hide.css' />";
 	}