@GLSpro 

Hi!

Due to the language difference, I would try to reply in English and hope you don’t mind:-D

For the LED lights, how about the RE light, did it still lit up?

Have you tried to reset the RE by holding the reset pinhole for 10s till all the lights are on then off?

And after that, please refer to the following instruction to set up:

https://www.tp-link.com/support/faq/1373/

while, if any step failed to pass-through, please feel free to share a picture of the error message here so that we could check for further steps;

Thank you~