I've deployed application in http://app.jelasticloud.com/ .
Application has file structure:
- www
-- vendors
--- moaction
---- moaction
--- twig
---- twig
The problem is that folders www/vendors/moaction/moaction and www/vendors/twig/twig are not accessible via file browser.
How did you deploy the application? From zip/tar, FTP, git etc.? If FTP, did you modify chmod - the problem may be that the Jelastic dashboard doesn't have read permissions there due to chmod values.
Alternatively it could be caused by browser cache; did you try logout/login again?
What did your hosting provider's support say about the issue? They can see the details at the server level to verify any issue at that side...