Fix

app/Datatables/Shop/OffersDataTable.php

@@ -12,7 +12,7 @@ class OffersDataTable extends DataTable
 
     public function query(Offer $model)
     {
-        $model = $model->with(['article.article_nature', 'variation', 'tariff']);
+        $model = $model->with(['article.article_nature', 'variation', 'tariff'])->select($model->getTable() . '.*');
         $model = self::filterByArticleNature($model);
         $model = self::filterByPackage($model);
         return $this->buildQuery($model);

app/Datatables/Shop/VariationsDataTable.php

@@ -16,6 +16,14 @@ class VariationsDataTable extends DataTable
         return $this->buildQuery($model);
     }
 
+    public function modifier($datatables)
+    {
+        $datatables
+            ->rawColumns(['description','action'])
+        ;
+        return parent::modifier($datatables);
+    } 
+
     protected function getColumns()
     {
         return [