One of my league members, Zorndog lost almost his entire roster overnight. Dozens of players released into free agency. This is during week 15 of season. Many others signed for 1 year minimum deals. He alerted me to this so I seriously doubt this was him.

This would essentially end the league (the dissolution of one team and quality players suddenly becoming available to everyone)

Can you look into this please?

This is an issue that has been identified that is happening when a team signs a player of the waiver wire late in the season and their cap getting messed up to the point that it cannot be repaired in the current season. I will have a patch hopefully this weekend but the only solution is to reset the league to before the stage ran, which unfortunately is an extremely big deal.