diff --git a/typo3/sysext/install/Classes/Controller/UpgradeController.php b/typo3/sysext/install/Classes/Controller/UpgradeController.php
index f38d33642342a64c82b344d7a290ce6bc0079773..7e5b2e8d977172325b68b82823f2b3b20a923a8d 100644
--- a/typo3/sysext/install/Classes/Controller/UpgradeController.php
+++ b/typo3/sysext/install/Classes/Controller/UpgradeController.php
@@ -202,6 +202,7 @@ class UpgradeController extends AbstractController
     public function cardsAction(ServerRequestInterface $request): ResponseInterface
     {
         $view = $this->initializeStandaloneView($request, 'Upgrade/Cards.html');
+        $view->assign('extensionFoldersInTypo3conf', (new Finder())->directories()->in(Environment::getExtensionsPath())->depth(0)->count());
         return new JsonResponse([
             'success' => true,
             'html' => $view->render(),
diff --git a/typo3/sysext/install/Resources/Private/Templates/Upgrade/Cards.html b/typo3/sysext/install/Resources/Private/Templates/Upgrade/Cards.html
index 46d6496e74d88a3daccfec3280086d01c108f079..de21fe6a11345df07bdea2558a1ade4b4db1de0d 100644
--- a/typo3/sysext/install/Resources/Private/Templates/Upgrade/Cards.html
+++ b/typo3/sysext/install/Resources/Private/Templates/Upgrade/Cards.html
@@ -68,14 +68,23 @@
             <a href="#" class="btn btn-default" data-require="TYPO3/CMS/Install/Module/Upgrade/TcaMigrationsCheck">Check TCA Migrations</a>
         </div>
     </div>
-    <div class="card card-size-fixed-small">
+    <div class="card card-size-fixed-small {f:if(condition:'!{extensionFoldersInTypo3conf}', then: 'card-disabled')}">
         <f:render partial="Card/Header" arguments="{ title: 'Scan Extension Files', subtitle: 'Extensions', icon: 'Icons/modules/install-scan-extensions.svg'}" />
         <div class="card-content">
             <p class="card-text">Scan extensions for usage of deprecated or outdated TYPO3 API calls.</p>
         </div>
-        <div class="card-footer">
-            <a href="#" class="btn btn-default" data-require="TYPO3/CMS/Install/Module/Upgrade/ExtensionScanner">Scan Extension Files</a>
-        </div>
+        <f:if condition="{extensionFoldersInTypo3conf}">
+            <f:then>
+                <div class="card-footer">
+                    <a href="#" class="btn btn-default" data-require="TYPO3/CMS/Install/Module/Upgrade/ExtensionScanner">Scan Extension Files</a>
+                </div>
+            </f:then>
+            <f:else>
+                <div class="card-footer text-muted">
+                    You can't use this feature, because no extension folders were found.
+                </div>
+            </f:else>
+        </f:if>
     </div>
 </div>