I just had a similar issue like this with the trellis probe after upgrade to 8.5.
Thread:
What I had to do once the upgrade finally worked was stop all services on Pri-Hub. Start all services then wait for everything to start up. Deactivated the broken probes so in my case: nas, trellis and prediction. Full stop, then start of Nimsoft Robot watcher service.
Then once all other probes were up and running with PID's I select all 3 and Activated and it worked. They finally all started back up normally.
If that doesn't work is your nas probe just RED in an error state or just not processing alarms?