diff --git a/.github/workflows/files-external-smb-kerberos.yml b/.github/workflows/files-external-smb-kerberos.yml
index 61b4b48251394..53f4084440975 100644
--- a/.github/workflows/files-external-smb-kerberos.yml
+++ b/.github/workflows/files-external-smb-kerberos.yml
@@ -51,6 +51,12 @@ jobs:
           repository: nextcloud/user_saml
           path: apps/user_saml
 
+      - name: Install user_saml
+        run: |
+          cd apps/user_saml
+          composer i
+          cd ../..
+
       - name: Pull images
         run: |
           docker pull ghcr.io/icewind1991/samba-krb-test-dc
diff --git a/lib/private/Files/ObjectStore/S3ConnectionTrait.php b/lib/private/Files/ObjectStore/S3ConnectionTrait.php
index 86c665aa5f6b0..c7191ba285875 100644
--- a/lib/private/Files/ObjectStore/S3ConnectionTrait.php
+++ b/lib/private/Files/ObjectStore/S3ConnectionTrait.php
@@ -40,6 +40,7 @@
 use Aws\S3\S3Client;
 use GuzzleHttp\Promise;
 use GuzzleHttp\Promise\RejectedPromise;
+use OCP\Files\StorageNotAvailableException;
 use OCP\ICertificateManager;
 use OCP\Server;
 use Psr\Log\LoggerInterface;
@@ -155,12 +156,12 @@ public function getConnection() {
 				$logger->debug('Bucket "' . $this->bucket . '" This bucket name is not dns compatible, it may contain invalid characters.',
 					['app' => 'objectstore']);
 			}
-	
+
 			if ($this->params['verify_bucket_exists'] && !$this->connection->doesBucketExist($this->bucket)) {
 				try {
 					$logger->info('Bucket "' . $this->bucket . '" does not exist - creating it.', ['app' => 'objectstore']);
 					if (!$this->connection::isBucketDnsCompatible($this->bucket)) {
-						throw new \Exception("The bucket will not be created because the name is not dns compatible, please correct it: " . $this->bucket);
+						throw new StorageNotAvailableException("The bucket will not be created because the name is not dns compatible, please correct it: " . $this->bucket);
 					}
 					$this->connection->createBucket(['Bucket' => $this->bucket]);
 					$this->testTimeout();
@@ -170,17 +171,17 @@ public function getConnection() {
 						'app' => 'objectstore',
 					]);
 					if ($e->getAwsErrorCode() !== 'BucketAlreadyOwnedByYou') {
-						throw new \Exception('Creation of bucket "' . $this->bucket . '" failed. ' . $e->getMessage());
+						throw new StorageNotAvailableException('Creation of bucket "' . $this->bucket . '" failed. ' . $e->getMessage());
 					}
 				}
 			}
-	
+
 			// google cloud's s3 compatibility doesn't like the EncodingType parameter
 			if (strpos($base_url, 'storage.googleapis.com')) {
 				$this->connection->getHandlerList()->remove('s3.auto_encode');
 			}
 		} catch (S3Exception $e) {
-			throw new \Exception('S3 service is unable to handle request: ' . $e->getMessage());
+			throw new StorageNotAvailableException('S3 service is unable to handle request: ' . $e->getMessage());
 		}
 
 		return $this->connection;
diff --git a/lib/private/Files/SetupManager.php b/lib/private/Files/SetupManager.php
index d559f88c2f9a1..436ea4eb2258a 100644
--- a/lib/private/Files/SetupManager.php
+++ b/lib/private/Files/SetupManager.php
@@ -39,7 +39,7 @@
 use OC_App;
 use OC_Hook;
 use OC_Util;
-use OCA\Files_External\Config\ConfigAdapter;
+use OCA\Files_External\Config\ExternalMountPoint;
 use OCA\Files_Sharing\External\Mount;
 use OCA\Files_Sharing\ISharedMountPoint;
 use OCA\Files_Sharing\SharedMount;
@@ -149,7 +149,7 @@ function ($mountPoint, IStorage $storage, IMountPoint $mount) use ($reSharingEna
 
 		// install storage availability wrapper, before most other wrappers
 		Filesystem::addStorageWrapper('oc_availability', function ($mountPoint, IStorage $storage, IMountPoint $mount) {
-			$externalMount = $mount instanceof ConfigAdapter || $mount instanceof Mount;
+			$externalMount = $mount instanceof ExternalMountPoint || $mount instanceof Mount;
 			if ($externalMount && !$storage->isLocal()) {
 				return new Availability(['storage' => $storage]);
 			}