@Misses 

If no network access with your router, you may try the following troubleshooting

Orange/Red Internet light on the router:

    1. Unplug your router from the modem, connect your PC directly into the modem to verify the Internet status of your ISP.

    2. Reboot the ISP Modem and the Router, you must firstly power on the Router, once the router's fully powered on, power on the modem.

    3. Login to the web UI via http://tplinkwifi.net and set it up following the Quick Setup.

    4. If your PC has Internet when connected to the modem, but the Router still doesn't, please go to Advanced > Network > Internet > Mac Clone to clone the mac address of your PC. This FAQ contains detailed instructions of Mac Clone: How do I configure MAC Address Clone on my TP-Link Archer Router?

Green Internet light on the router:

    1. Login to the web management interface of the router (http://tplinkwifi.net), go to Advanced > Network > Internet > Advanced Settings > Change the DNS Servers into 1.1.1.1 and 8.8.8.8.

    2. Reboot the ISP Modem and the Router, you must firstly power on the Router, once the router's fully powered on, power on the modem.

You may check more detailed instructions following the FAQ: What should I do if I cannot access the internet through Wi-Fi router?