diff --git a/public/typo3conf/ext/ep_track/Classes/Middleware/TrackingMiddleware.php b/public/typo3conf/ext/ep_track/Classes/Middleware/TrackingMiddleware.php
index 0ab3839f..b21c408d 100644
--- a/public/typo3conf/ext/ep_track/Classes/Middleware/TrackingMiddleware.php
+++ b/public/typo3conf/ext/ep_track/Classes/Middleware/TrackingMiddleware.php
@@ -35,6 +35,7 @@ use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
 use Psr\Http\Server\MiddlewareInterface;
 use Psr\Http\Server\RequestHandlerInterface;
+use TYPO3\CMS\Core\Exception\SiteNotFoundException;
 use TYPO3\CMS\Core\Http\NormalizedParams;
 use TYPO3\CMS\Core\Http\RedirectResponse;
 use TYPO3\CMS\Core\Site\SiteFinder;
@@ -107,9 +108,24 @@ class TrackingMiddleware implements MiddlewareInterface
         $targetPage = $redirect['target_page_uid'];
         $responseCode = $redirect['response_code'];
 
+        // Fallback for old t3:// links
+        if (1 === preg_match('/^t3:\/\/page\?uid=(\d+)$/', $targetPage, $matches)) {
+            $targetPage = $matches[1];
+        }
+
+        // Skip redirecting of non-numeric page uids like full urls
+        if (false === is_numeric($targetPage)) {
+            return null;
+        }
+
         /** @var SiteFinder $siteFinder */
         $siteFinder = GeneralUtility::makeInstance(SiteFinder::class);
-        $site = $siteFinder->getSiteByPageId($targetPage);
+        try {
+            $site = $siteFinder->getSiteByPageId((int)$targetPage);
+        }
+        catch (SiteNotFoundException $exception) {
+            return null;
+        }
 
         $params = [];