The owner pumped £10m in on their last accounts to keep them afloat and most of the money they owe is to him. He had probably loaned more since and it will be closer to £70m, but costs going up every season and he is out of cash, and I suspect most of his personal wealth is now tied up in SWFC so he can't afford to write it off and walk away, but not chance it gets wound up either or he loses everything.
The issue is if he sells the club at a fair value he gets a fraction back of what he put in, most likely about half maximum, but any potential buyer can get it cheaper if it folds completely so they are no going to pay a fair price.
What is the solution? The club probably owes £90m now, it is worth half that at a push and no one will pay near that, so if you buy it for £20m the owner gets 0 and loses £70m? There will be vultures interested in the club but they want a dead carcass first.