"So, we had People that were legal. We had aircraft that were available, but the process of matching those Crew Members with the aircraft could not be handled by our technology. In our desired state, we have a solver that would be able to do that very quickly and accurately. Our system today cannot do that."
Sounds like at the core of it is some algorithms or IT systems that aren't sufficiently scalable and that have collapsed, forcing them to do manual work that also doesn't scale. Their upcoming "reset" is analogous to a similar situation that caused a Slack outage some years ago where the system got stuck in an overload state that it couldn't get out of and they had to effectively shut it down and re-open the service slowly to rewarm the caches.