After that, save the modifications by switching your Orbi router to AP mode. After putting the router in AP mode, try connecting to it with a different device to see if the issue has been fixed. Try returning your Orbi router to its factory settings and carrying out the previously mentioned steps again if the problem continues. To sum up, if you want to guarantee a seamless Netgear Orbi setup process, you can fix the 404 problem by moving your Orbi router to AP mode.