Dear @Huzell,

But when I connect a second router's internet port to my CPE 210 Client LAN port it doesn't work anymore. I can connect to the router and it doesn't say "no internet connection" so it looks fine, but if I try to browse to a page it's just not loading.

Try other applications and different clients. Do they all get no Internet access? 

To get an Internet connection, the clients need to obtain IP address, DNS server from the network, you may check the IP info as well.

For the case, you may connect a PC instead to the CPE Client via the same Ethernet cable, confirm whether the internet works on the PC.

Here is a troubleshooting guide for your reference. https://www.tp-link.com/support/faq/1068/

Dear @Huzell,

The client is connected to the AP and the AP has internet connection so it must be something with fhe Client settings right? 

Right. Please check whether the wireless signal bars are lit up steadily on the CPE Client.

If not, it's suggested to reconfigure the CPE Client, ensure you connect to the correct root AP with the correct password. After you finish the settings, please check the Radio status section on the STATUS page to verify if the Client is connected to the root AP properly.

How to Configure the Client Mode on the Pharos device, https://www.tp-link.com/support/faq/727/

How can I set up the AP + Client topology successfully, https://www.tp-link.com/support/faq/2575/