@@ -12,6 +12,7 @@
 
 namespace Contao\CoreBundle\Routing\Content;
 
+use Contao\CoreBundle\Exception\ForwardPageNotFoundException;
 use Contao\CoreBundle\InsertTag\InsertTagParser;
 use Contao\PageModel;
 use Symfony\Component\HttpFoundation\RequestStack;
@@ -36,6 +37,10 @@ public function resolve(object $content): ContentUrlResult|null
 
         $url = $this->insertTagParser->replaceInline($content->value);
 
+        if ('' === $url) {
+            throw new ForwardPageNotFoundException();
+        }
+
         if (!parse_url($url, PHP_URL_SCHEME)) {
             $url = $this->urlHelper->getAbsoluteUrl($url);
         }
 
@@ -13,6 +13,7 @@
 namespace Contao\CoreBundle\Tests\Routing\Content;
 
 use Contao\ArticleModel;
+use Contao\CoreBundle\Exception\ForwardPageNotFoundException;
 use Contao\CoreBundle\InsertTag\InsertTagParser;
 use Contao\CoreBundle\Routing\Content\StringResolver;
 use Contao\CoreBundle\Routing\Content\StringUrl;
@@ -43,6 +44,29 @@ public function testAbstainsIfContentIsNotAStringUrl(): void
         $this->assertNull($result);
     }
 
+    public function testThrowsExceptionIfInsertTagIsEmpty(): void
+    {
+        $content = new StringUrl('{{link_url::42}}');
+
+        $insertTagParser = $this->createMock(InsertTagParser::class);
+        $insertTagParser
+            ->expects($this->once())
+            ->method('replaceInline')
+            ->with($content->value)
+            ->willReturn('')
+        ;
+
+        $requestStack = new RequestStack();
+        $requestContext = new RequestContext();
+        $urlHelper = new UrlHelper($requestStack, $requestContext);
+
+        $resolver = new StringResolver($insertTagParser, $urlHelper, $requestStack, $requestContext);
+
+        $this->expectException(ForwardPageNotFoundException::class);
+
+        $resolver->resolve($content);
+    }
+
     /**
      * @dataProvider stringUrlProvider
      */