"Failed to apply command" when trying to disable Guest Network

I tried disabling my guest network. Then I tried adding a password to it, but I always get the "Failed to apply command" error.

I've tried from both the Insight Website and the app. 

The firmware is up to date, and also rebooted after update.

Here's the notification I get on email:

The following operation did not execute completely:

Details:
Device Name: MyCompany //Placeholder name

Network Name: OrbiPro-Location

Serial Number: XXXXXXXXXXX //Placeholder serial number

Model: SXR50

Failure Reason: Unable to update guest portal for device MyCompany