Although I don't see your attachment, my guess is about the same as yours for the log. Then I'm wondering what happened between the time "did work" and "now". Did you upgrade the system or change some SSL-VPN related config, or really nothing has happened?
And, that's what TAC would ask you to do or do it themselves when you open a ticket and don't find anything wrong in the config. It just affects to any ongoing SSL VPN sessions if anything is up, instead of affecting to everybody when you reboot the unit.
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