To go back to the initial WiFi setup mode, you need to hold down on the touchpad for 2-3 minutes or until the lamp turns dim red. Then, you will be able to set it up using the Luvlink App.
Here are the set up instructions: https://www.luvlink.com/pages/friendship-lamps-setup-guide
If the above instructions don’t work, please unplug your lamp, turn off your WiFi at the router, wait for 10 seconds, turn the router back on and plug the lamp back in. At this point, the lamp should turn blue and then dim red, meaning it is in WiFi setup mode.
Then, go back to the app and try again with the setup.