They are on two differnt networks they can't talk to each other.
If your Apex was on DHCP then things will be easier. If you made a static address for the Apex then you will need to access the Apex through a USB cable or reset the Apex. If you get into the Apex with the USB then you need to set the Apex to DHCP. If you are on WiFi you will also need to change your WiFi credentials on the Apex.
Once you get the Apex on DHCP the router will assign it a new 10. address. You will need to log into the router and look at the routes in the router to determine which IP your Apex is. Apex is pretty good about providing the user login as a name so you can quickly identify the Apex. You can then log into the Apex locally and change anything you need to. Apex is pretty slow at getting Fusion up and running but if you can get in locally then eventually it will get the Fusion up so that you can access it via the web.