diff --git a/src/Controller/OfferController.php b/src/Controller/OfferController.php
index b66f0d4..9b2572e 100644
--- a/src/Controller/OfferController.php
+++ b/src/Controller/OfferController.php
@@ -6,7 +6,6 @@ use App\Entity\Offering;
 use App\Form\OfferingFormType;
 use App\Form\OfferFilterFormType;
 
-
 use App\Repository\OfferingRepository;
 use App\Repository\WishRepository;
 
@@ -34,7 +33,7 @@ class OfferController extends AbstractController
     }
 
     #[Route('/offers', name: 'offers')]
-    public function distanceExample(Environment $twig, Request $request, OfferingRepository $offerRepository, PlzToCoordinate $plzconverter, DistanceCalculator $distanceCalculator): Response
+    public function showAll(Environment $twig, Request $request, OfferingRepository $offerRepository, PlzToCoordinate $plzconverter, DistanceCalculator $distanceCalculator): Response
     {
         $form = $this->createForm(OfferFilterFormType::class);
         $form->handleRequest($request);
@@ -46,25 +45,30 @@ class OfferController extends AbstractController
             $filterDistance = $form->get('distance')->getData();
             $filterPlz = $form->get('zipCode')->getData();
             $filterCoordinate = $plzconverter->convertPlzToCoordinate($filterPlz);
-
-            foreach ($allOffers as $offer) {
-                $offerCoordinate = $offer->getCoordinate();
-                
-                $distance = $distanceCalculator->calculateDistance($offerCoordinate, $filterCoordinate);
-        
-                if ($distance < $filterDistance) {
-                    array_push($filteredOffers, $offer);
+            
+            if ($filterCoordinate != null) {
+                foreach ($allOffers as $offer) {
+                    $offerCoordinate = $offer->getCoordinate();
+                    
+                    $distance = $distanceCalculator->calculateDistance($offerCoordinate, $filterCoordinate);
+            
+                    if ($distance < $filterDistance) {
+                        array_push($filteredOffers, $offer);
+                    }
                 }
             }
+            else {
+                $this->addFlash("error", "The PLZ was not found!");
+            }
         }
         else {    
             $filteredOffers = $allOffers;
         }
         
-        return new Response($twig->render('offer/index.html.twig', [
+        return $this->render('offer/index.html.twig', [
             'offers' => $filteredOffers,
             'filter_form' => $form->createView()
-        ]));
+        ]);
     }
 
     #[Route('/new', name: 'new_offer')]
diff --git a/templates/offer/index.html.twig b/templates/offer/index.html.twig
index ff31135..ab99fa2 100644
--- a/templates/offer/index.html.twig
+++ b/templates/offer/index.html.twig
@@ -9,6 +9,11 @@
         {{ message }}
     </div>
     {% endfor %}
+    {% for message in app.flashes('error') %}
+    <div class="alert alert-danger" role="alert">
+        {{ message }}
+    </div>
+    {% endfor %}
 
     <h2><i class="fas fa-filter"></i>Filter</h2>
     {{ form_start(filter_form) }}
@@ -53,6 +58,6 @@
             {% endfor %}
         </div>
     {% else %}
-        <div class="alert alert-warning" role="alert">There are currently no active offers.</div>
+        <div class="alert alert-warning" role="alert">There are no active offers with the current filter.</div>
     {% endif %}
 {% endblock %}
\ No newline at end of file