Slate Plus (GL-A1300) with Nord VPN's OpenVPN: Client Auth Error

I’m using an GL-A1300, firmware version 4.2.3. The router was working fine until lately, and lately I’ve had no luck connect to nordvpn north american servers. Always get the following message,

Sun Aug 13 23:18:48 2023 daemon.notice ovpnclient[11809]: AUTH: Received control message: AUTH_FAILED
Sun Aug 13 23:18:48 2023 daemon.notice ovpnclient[11809]: SIGTERM[soft,auth-failure] received, process exiting

I’m sure username/password are valid, i can use them to login nordvpn website no issue. There is no special characters in the password. I’ve also removed config and reset the router but still the same. Appreciate any help.