Section resolver exepction

Resolver/SectionResolver.php

         $currentAdminSection = null;
         $userMerchant = $this->merchantResolver->getUserMerchant();
 
-        if($userMerchant!==null){
+        if ($userMerchant !== null) {
             $currentAdminSection = $userMerchant->getCurrentAdminSection();
         }
 
-        if($currentAdminSection === null){
-            $currentAdminSection = $this->sectionRepository->findOneBy(array('isDefault'=>true));
+        if ($currentAdminSection === null) {
+            $currentAdminSection = $this->sectionRepository->findOneBy(array('isDefault' => true));
+            if ($currentAdminSection === null) {
+                throw new \ErrorException('Aucune section par défaut définie pour ce merchant');
+            }
         }
+
         return $currentAdminSection;
     }