Can't delete NextDNS profile from macOS Network Preferences

Still happening on macOS 13.5 beta on a M1 MacMini  

Like many of you, mine persisted even after deleting. I went to apple.nextdns.io, downloaded another profile (named it in all lowercase so I know it's a new profile), installed it, then deleted it. Rebooted computer and no more traces of the old profile (or the new profile). This is with macOS 14.3.

I have the same error with MacOS 15.5 on an M4. The solution is this script.

#!/bin/bash
PLIST="/Library/Preferences/com.apple.networkextension.plist’
BACKUP="$PLIST.bak’

echo ‘ Create backup...’
[ -e ‘$BACKUP’ ] || cp ‘$PLIST’ ‘$BACKUP’ && echo ‘ Backup created: $BACKUP’

echo ‘ Search plist for NextDNS...’
/usr/libexec/PlistBuddy -c ‘Print’ ‘$PLIST’ 2>/dev/null | grep -i nextdns | while read -r line; do
    key=$(echo ‘$line’ | awk -F= ‘{print $1}’ | xargs)
    echo ‘ Remove key: $key’
    /usr/libexec/PlistBuddy -c ‘Delete :$key’ ‘$PLIST’ 2>/dev/null
done

sudo launchctl kickstart -k system/com.apple.nehelper
echo ‘ Done.’