Smart life unrecognized bulb

Hello, I've had my bulbs for over 4 months and everything was working perfectly. I recently changed my router and that's when the problems started. I went into the Smart Life app and saw that my bulbs were offline even though they were on. So I decided to reset the bulbs, but the app doesn't detect the two bulbs. So I try again and again, and it still doesn't work, even though the bulbs are blinking quickly and my Wi-Fi is on 2.4GHz.