can't connect to my router 5g message

Hello I just bought a brand new Yeelight 2. I tried connecting it to my router but during the proccess the yeellight app says that the router cant support 5g networks although the router runs in the 2.4Ghz Frequency. Can I do something with the setting of the router? (the router is a tp-link TD-W8951ND)

Check if router has mixed WiFi mode and turn off.