1) Are you sure all of the bundles listed are in the vendors directory and downloaded correctly? 2) Have you added all the bundles to the AppKernel? The error seems to me like you have not added the bundles to the AppKernel, or perhaps you missed one. 3) Did you check that your UserBundle properly extends the FOSUserBundle? I believe the issue is more likely to be with FOSUserBundle not being installed correctly. Did you try my suggestion to disable the SecurityBundle to ensure your custom UserBundle is working correctly first?