I did several testing to reproduce the issue.
1.I reset the router to factory settings.
2.Plugged directly to the RJ45 jack in the wall.
3.initial configuration with disabling WiFi and entering pcwrt credential for the remote access.
It works for the first try and many tries as long as I stay in the same window but if I reboot the router or the computer or just leave it for 15 min or so. It will get that error and I will have to play around with changing blind port or something to get it to work again temporally like stated above.