Missing assets are typically caused by misconfigured URL rewriting. On Apache, mod_rewrite is responsible for that. Check Apache access logs to see what is going on. Maybe mod_rewrite is just not enabled.

Here is an tutorial how to enable it on Ubuntu

https://www.digitalocean.com/community/tutorials/how-to-set-up-mod_rewrite-for-apache-on-ubuntu-14-04

you should be able to find guides for other distributions as well.