So i think the problem is
mesh settings has to be enabled manually from Jio Fiber
Router. For that you need to login to Jio Router page by using default IP
https://192.168.29.1 and login. For default credentials, use “admin” as username and “Jiocentrum”. Once logged in, go to status > Mesh Network > Mesh Configuration > Mesh Enable. Select it to on and click save. Then router will reboot and then try to pair mesh router again. It should work.