B1 wifi not working

Helloo, I have three B1 bulb in my room. I bought those a month ago and it was working well. But from yesterday, the wifi stopped working. All the three bulbs got disconnected and it is not connecting till then. I already reset those bulbs and also re-installed the app, but it’s still the same.


If it’s not connected to the WiFi, then I cannot voice control with the google nest.
Please resolve this issue.
Thank you 

Dear user,
Thank you for your inquiry.
All bulbs have disconnected simultaneously, which may be due to a WiFi router or network issue. 
Please try restarting the router, ensure it is functioning properly and is set to 2.4G network only, then reconnect the bulbs.
Please feel free to  contact us if there are any further questions.
Best regards
Lepro Customer Service Team