Catch StorageInvalidException in webdav

lib/private/connector/sabre/objecttree.php

@@ -11,6 +11,7 @@ namespace OC\Connector\Sabre;
 use OC\Files\FileInfo;
 use OC\Files\Filesystem;
 use OC\Files\Mount\MoveableMount;
+use OCP\Files\StorageInvalidException;
 use OCP\Files\StorageNotAvailableException;
 
 class ObjectTree extends \Sabre\DAV\ObjectTree {
@@ -88,6 +89,8 @@ class ObjectTree extends \Sabre\DAV\ObjectTree {
 				$info = $this->fileView->getFileInfo($path);
 			} catch (StorageNotAvailableException $e) {
 				throw new \Sabre\DAV\Exception\ServiceUnavailable('Storage not available');
+			} catch (StorageInvalidException $e){
+				throw new \Sabre\DAV\Exception\NotFound('Storage ' . $path . ' is invalid');
 			}
 		}