- Fixed assets whenever it's not installed

src/Lean.php

@@ -102,6 +102,8 @@ class Lean
     {
         $list = array_merge(...array_map(fn($app) => $app->views ?? [], $this->applications));
 
+        $this->verifyPathList($list);
+
         uasort($list, fn($i1, $i2) => $i1['order'] <=> $i2['order'] );
 
         return $list;
@@ -111,11 +113,22 @@ class Lean
     {
         $list = array_merge(...array_map(fn($app) => $app->piceaAssets ?? [], $this->applications));
 
+        $this->verifyPathList($list);
+
         uasort($list, fn($i1, $i2) => $i1['order'] <=> $i2['order'] );
 
         return $list;
     }
 
+    protected function verifyPathList(array $list) : void
+    {
+        foreach($list as $item) {
+            if (! isset($item['order']) ) {
+                throw new \RuntimeException(sprintf("An error occured while verifying a path list (%s)", json_encode($item, \JSON_PRETTY_PRINT)));
+            }
+        }
+    }
+
     public function getI18n(string $reader) : ? array
     {
         switch($reader) {

src/PiceaDefaultRegistration.php

@@ -22,7 +22,7 @@ class PiceaDefaultRegistration extends DefaultRegistrations {
     {
         parent::registerAll($compiler);
 
-        $this->ui->registerFormExtension($compiler);
-        $this->asset->registerExtension($compiler);
+        $this->ui AND $this->ui->registerFormExtension($compiler);
+        $this->asset AND $this->asset->registerExtension($compiler);
     }
 }