TFG had to pay off MSP with immediate effect due to the structure of that deal, but either didn't have or didn't want to stump up enough to also clear the 777 debt.
The risk with the 777 debt is a court's involvement. A-Cap will of course push for the highest possible valuation on 777's debt, but even if the parties agree to something the court might set it aside and apply its own figures. That's the morass TFG doesn't want to risk getting sucked into.
Until there's some clarity on that front, it will be difficult to transact a sale. Moshiri has, in essence, screwed himself. Every day racks up further interest charges that will just diminish what he can recover from his mismanagement.