debug 2

app/controllers/api/storage.php

@@ -973,6 +973,8 @@ App::get('/v1/storage/buckets/:bucketId/files/:fileId/preview')
             throw new Exception(Exception::GENERAL_SERVER_ERROR, 'Imagick extension is missing');
         }
 
+        Console::info("cookie domain: " . Config::getParam('cookieDomain'));
+
         /* @type Document $bucket */
         $bucket = Authorization::skip(fn () => $dbForProject->getDocument('buckets', $bucketId));
 

app/controllers/general.php

@@ -1008,7 +1008,10 @@ App::init()
                 $endDomain->getRegisterable() !== ''
         );
 
-        $isLocalHost = $request->getHostname() === 'localhost' || $request->getHostname() === 'localhost:' . $request->getPort();
+        $isLocalHost =
+            $request->getHostname() === 'localhost' ||
+            $request->getHostname() === 'localhost:' . $request->getPort() ||
+            str_ends_with($request->getHostname(), '.localhost');
         $isIpAddress = filter_var($request->getHostname(), FILTER_VALIDATE_IP) !== false;
 
         $isConsoleProject = $project->getAttribute('$id', '') === 'console';