What should I do if I fail to login Archer MR400(EU)/Archer MR200(EU)v2’s web UI?

If browser’s language is Russian, Italian, German, Turkish, or Polish, web server won’t respond when click ‘login’.
We have released new firmwares to fix the bug (Archer MR200(EU)_V2_170927, Archer MR400(EU)_V1_170907), please refer to the one of following two methods to upgrade:

Method 1: Via Web UI
1. Please change the browser’s language to another one (Chrome is recommended),
https://support.google.com/chromebook/answer/1059490?hl=en
2. Refer to the link below to upgrade the firmware:
http://www.tp-link.com/en/faq-1667.html

Method 2: Via Tether
Please connect smartphone to TP-Link’s wifi, then open Tether and enter the username and password to login the TP-Link device (They are the same as the login credentials for the web management page. The default Login username and password are both “admin”.)
Go to ‘ Tools – System –Firmware Update’ to upgrade the firmware.