@Tonmoy Hello, what is the model number of your TP-Link device? And what is the hardware version? You can find them on the back of the actual device. Meanwhile, from the error message, the current...

@Mkmkmk Hello, what is the model number of your TP-Link device? And may I know why do you want to change the email address of your account? Thanks a lot.

@Black_Canary Try the default password first which is admin, if it does not work, I'm afraid that you have to reset it like Selin said and re-login with admin. Good day.

@Dougleigh Hello, what is the led status of the RE450 now? Try to forget the network and reconnect to the RE450's wifi; you can reboot the range extender as well. With computer connected to the RE450...

@shawly Hello, what is the current operation mode of the RE200? Is it access point or range extender? How did you log into the web UI of the RE200? With the IP address or the domain name? Try to log...

@Hasan_3000 May I know why do you think there is a compatibility issue? Please provide more information. What is the current led status of the TL-WA850RE? Have you ever configured it with the main...