Setting up Apex for the first time is tricky. You need to hard wire it to your Router for the first time to set it up.
When it's connected to Fusion, follow these steps to get wifi going:
Turn Off wifi on your laptop, Hard wire your laptop to the extender, log into the extender page. (Address should be in your extender manual or back of it) Switch to static IP (This is only within your house and you don't need to buy a static IP from your ISP) (I used 192.168.0.50) and then change the mode of wifi extension to Off.
Then turn OFF the DCHP on APEX and assign APEX a static IP when is connected to the extender. (I used 192.168.0.51)
Reset the APEX Network and done.