diff --git a/.gitignore b/.gitignore
index d85572b6..93d5a1ba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -61,4 +61,5 @@ package-lock.json
 move_app.sh
 dev-environment*/
 js/
-*.cache
\ No newline at end of file
+*.cache
+.uuid
\ No newline at end of file
diff --git a/README.md b/README.md
index 8316b764..924c4253 100644
--- a/README.md
+++ b/README.md
@@ -53,3 +53,10 @@ The command may take a while and starts Nextcloud directly. Nextcloud can then b
 
 In the future, Nextcloud can then be started again by changing to the
 folder "nextcloud-docker-dev" and running ```docker compose up nextcloud proxy```. For more information see the [Nextcloud app development tutorials](https://cloud.nextcloud.com/s/iyNGp8ryWxc7Efa). These steps set up the official Nextcloud Dev Environment. It uses an SQLite databse. If you want to test on a production like instance you can set up a real Nextcloud Server using this [compose file](compose.yaml).
+
+### Useful commands
+
+To trigger cronjobs manually you can use the following command:
+```bash
+docker exec --user www-data {nextcloud_container} php /var/www/html/cron.php
+```
diff --git a/compose.yaml b/compose.yaml
index 28a1a1c7..37ce9978 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -38,6 +38,8 @@ services:
     hostname: nextcloud-db
     restart: unless-stopped
     image: mariadb:10.8
+    ports:
+      - "3306:3306"
     environment:
       MYSQL_ROOT_PASSWORD: root
       MYSQL_DATABASE: ncdb
diff --git a/lib/BackgroundJobs/ScanJob.php b/lib/BackgroundJobs/ScanJob.php
index 0d721ada..c1a31747 100644
--- a/lib/BackgroundJobs/ScanJob.php
+++ b/lib/BackgroundJobs/ScanJob.php
@@ -5,9 +5,10 @@
 use Exception;
 use OCA\GDataVaas\Service\TagService;
 use OCA\GDataVaas\Service\VerdictService;
-use OCP\BackgroundJob\TimedJob;
 use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\BackgroundJob\TimedJob;
 use OCP\IConfig;
+use Psr\Log\LoggerInterface;
 
 class ScanJob extends TimedJob
 {
@@ -16,11 +17,13 @@ class ScanJob extends TimedJob
     private TagService $tagService;
     private VerdictService $scanService;
     private IConfig $appConfig;
+    private LoggerInterface $logger;
 
-    public function __construct(ITimeFactory $time, TagService $tagService, VerdictService $scanService, IConfig $appConfig)
+    public function __construct(LoggerInterface $logger, ITimeFactory $time, TagService $tagService, VerdictService $scanService, IConfig $appConfig)
     {
         parent::__construct($time);
 
+        $this->logger = $logger;
         $this->tagService = $tagService;
         $this->scanService = $scanService;
         $this->appConfig = $appConfig;
@@ -37,14 +40,17 @@ public function __construct(ITimeFactory $time, TagService $tagService, VerdictS
      */
     protected function run($argument): void
     {
-        $unscannedTagIsDisabled = $this->appConfig->getAppValue(self::APP_ID, 'disableUnscannedTag');
         $autoScan = $this->appConfig->getAppValue(self::APP_ID, 'autoScanFiles');
         if (!$autoScan) {
             return;
         }
+        $unscannedTagIsDisabled = $this->appConfig->getAppValue(self::APP_ID, 'disableUnscannedTag');
         $autoScanOnlyNewFiles = $this->appConfig->getAppValue(self::APP_ID, 'scanOnlyNewFiles');
         $quantity = $this->appConfig->getAppValue(self::APP_ID, 'scanQueueLength');
-        if ($quantity == "") {
+        try {
+            $quantity = intval($quantity);
+        }
+        catch (Exception) {
             $quantity = 5;
         }
 
@@ -67,12 +73,14 @@ protected function run($argument): void
                 $fileIds = $this->tagService->getRandomTaggedFileIds([$maliciousTag->getId(), $cleanTag->getId(), $unscannedTag->getId(), $pupTag->getId()], $quantity, $unscannedTag);
             }
         }
+        
+        $this->logger->debug("Scanning " . count($fileIds) . " files: " . implode(", ", $fileIds));
 
         foreach ($fileIds as $fileId) {
             try {
                 $this->scanService->scanFileById($fileId);
-            } catch (Exception) {
-                // Do nothing
+            } catch (Exception $e) {
+                $this->logger->error("Failed to scan file with id " . $fileId . ": " . $e->getMessage());
             }
         }
     }
diff --git a/lib/Service/VerdictService.php b/lib/Service/VerdictService.php
index b9fa4dac..4241d6dc 100644
--- a/lib/Service/VerdictService.php
+++ b/lib/Service/VerdictService.php
@@ -35,7 +35,7 @@ class VerdictService
     private IConfig $appConfig;
     private FileService $fileService;
     private TagService $tagService;
-    private Vaas $vaas;
+    private ?Vaas $vaas = null;
     private LoggerInterface $logger;
 
     public function __construct(LoggerInterface $logger, IConfig $appConfig, FileService $fileService, TagService $tagService)
@@ -52,23 +52,6 @@ public function __construct(LoggerInterface $logger, IConfig $appConfig, FileSer
         $this->clientSecret = $this->appConfig->getAppValue(self::APP_ID, 'clientSecret');
         $this->username = $this->appConfig->getAppValue(self::APP_ID, 'username');
         $this->password = $this->appConfig->getAppValue(self::APP_ID, 'password');
-
-        if ($this->authMethod === 'ResourceOwnerPassword') {
-            $this->authenticator = new ResourceOwnerPasswordGrantAuthenticator(
-                "nextcloud-customer",
-                $this->username,
-                $this->password,
-                $this->tokenEndpoint
-            );
-        } elseif ($this->authMethod === 'ClientCredentials') {
-            $this->authenticator = new ClientCredentialsGrantAuthenticator(
-                $this->clientId,
-                $this->clientSecret,
-                $this->tokenEndpoint
-            );
-        }
-
-        $this->vaas = new Vaas($this->vaasUrl);
     }
 
     /**
@@ -80,10 +63,10 @@ public function __construct(LoggerInterface $logger, IConfig $appConfig, FileSer
      * @throws NotFoundException
      * @throws UploadFailedException
      * @throws TimeoutException
-     * @throws VaasAuthenticationException
      * @throws NotPermittedException
      * @throws FileDoesNotExistException if the VaaS SDK could not find the file
      * @throws EntityTooLargeException if the file that should be scanned is too large
+     * @throws VaasAuthenticationException if the authentication with the VaaS service fails
      */
     public function scanFileById(int $fileId): VaasVerdict
     {
@@ -110,9 +93,19 @@ public function scanFileById(int $fileId): VaasVerdict
                 throw new NotPermittedException("File is not in the allowlist");
             }
         }
+        
+        if ($this->vaas == null) {
+            $this->vaas = $this->createAndConnectVaas();
+        }
 
-        $this->vaas->Connect($this->authenticator->getToken());
-        $verdict = $this->vaas->ForFile($filePath);
+        try {
+            $verdict = $this->vaas->ForFile($filePath);
+        }
+        catch (Exception $e) {
+            $this->logger->error("Vaas for file: " . $e->getMessage());
+            $this->vaas = null;
+            throw $e;
+        }
 
         $this->logger->info("VaaS scan result for " . $node->getName() . " (" . $fileId . "): Verdict: " 
             . $verdict->Verdict->value . ", Detection: " . $verdict->Detection . ", SHA256: " . $verdict->Sha256 . 
@@ -173,4 +166,29 @@ private function getBlocklist(): array
         }
         return explode(",", $blocklist);
     }
+
+    /**
+     * @throws VaasAuthenticationException
+     */
+    private function createAndConnectVaas(): Vaas
+    {
+        if ($this->authMethod === 'ResourceOwnerPassword') {
+            $this->authenticator = new ResourceOwnerPasswordGrantAuthenticator(
+                "nextcloud-customer",
+                $this->username,
+                $this->password,
+                $this->tokenEndpoint
+            );
+        } elseif ($this->authMethod === 'ClientCredentials') {
+            $this->authenticator = new ClientCredentialsGrantAuthenticator(
+                $this->clientId,
+                $this->clientSecret,
+                $this->tokenEndpoint
+            );
+        }
+
+        $vaas = new Vaas($this->vaasUrl);
+        $vaas->Connect($this->authenticator->getToken());
+        return $vaas;
+    }
 }
diff --git a/src/files-action.js b/src/files-action.js
index fb996af3..35d37c30 100644
--- a/src/files-action.js
+++ b/src/files-action.js
@@ -1,4 +1,4 @@
-import { showError, showSuccess } from '@nextcloud/dialogs'
+import { showError, showSuccess, showWarning } from '@nextcloud/dialogs'
 import {FileAction, Permission, registerFileAction} from '@nextcloud/files'
 import Magnifier from '@mdi/svg/svg/magnify.svg?raw'
 
@@ -32,6 +32,9 @@ if (parseInt(OC.config.version.split('.')[0]) >= 28) {
 					case 'Clean':
 						showSuccess(t('gdatavaas', 'The file "' + file.basename + '" has been scanned with G DATA as verdict Clean'));
 						break;
+					case 'Pup':
+						showWarning(t('gdatavaas', 'The file "' + file.basename + '" has been scanned with G DATA as verdict PUP (Potentially unwanted program)'));
+						break;
 				}
 			} else {
 				try {