Install issues: database setup and domain-

Having an issue while trying to set InvoicePlane up. I tried setting the domain to in the settings, which directs to an Apache Reverse Proxy setup, which forwards it through to the server running InvoicePlane. However, I just get 404 errors when trying to open InvoicePlane using it.

After setting it to a local IP and starting the setup, after entering the MySQL details, once I go to the next step I just get a white screen.

Ubuntu Server 15.10, Apache 2.4.12, PHP 5.6.11, MySQL 5.6.31

Please try to disable strict mode of your database and try again.