@vPihka 

Follow this troubleshooting guide for your issue - Why cannot I connect to my wireless network

Hi@vPihka,

Welcome to our community.

Do you mean that the LAN connection of the router is working normally?

Please check the Wi-Fi lights. If they are off, press the Wi-Fi/WPS button on the back of the router for about 5-10 seconds until the lights flash. Then, confirm whether the Wi-Fi can be detected when the lights are stable.

If the Wi-Fi lights are on, please log in to the router's web UI to check the wireless settings. Make sure the 2.4G/5G network is enabled and not hidden.
How do I log into the web-based Utility (Management Page) of TP-Link wireless router?

Hi @vPihka,

Thank you for getting back to me.

Have you checked the WiFi lights of the router? Do you know if the WiFi lights are on?

If not, please press and hold this button for more than 2 seconds to turn on or off the wireless function of your router

Would you mind hard resetting the router for a try?

Press and hold the Reset hole/button for about 6 seconds until the Power LED blinks to reset the router to its factory default settings.