Saying i cannot login because it “Failed to load menu data”. After i restart the router, it’s possible for me to login again, but i need to do this a couple of times per day.
Are you connected to RUTX11 directly or through some other device?
Did you make any configuration changes on the device?
It is possible that the issue is within device configurations. Since I am not fully aware about all of your configurations on the device, the first thing I would suggest is to reset the device to its default settings (factory reset). If the issue persists, you can also try following the bootloader procedure described here.
Please, let me know if the issue persists after this.