Some error occurred while enabling/disabling remote management

Geez, "some error" is not particularly helpful.  This appears not to be the first time someone has run across this.  A Google search for that phrase turned up a number of hits, not all of them on the Netgear Orbi.  This forum post seems to indicate a solution:

https://community.netgear.com/t5/Orbi/Firmware-2-2-1-210-remote-management-not-working/m-p/1649177# 

I am not entirely certain which "reset" this use did (there are two).  Just pressing a sharp object (such as an unbeent paperclip) into the tiny "Reset" hole for 1 second will "reset" the Orbi and restart it.  A more drastic step is to perform a "Factory Reset":

https://www.youtube.com/watch?v=cMw4ePACgc4 This requires you to set it up again, which can be tedious.

There is a chance that people who pariticipate in the community forum specifically for the Orbi "app" may have more insight.

You might want to post there.

https://community.netgear.com/t5/Orbi-App/bd-p/en-home-orbi-app