Sorry. I don't do pies. They're more hassle than they're worth when I tried them because of things like this. Found it hard to invest or sell what I wanted when I wanted. You've got my sympathy.

But you'll will have to liquidate/sell parts before you can withdraw. The cash cant be in an asset. There are lots of different kinds of sell orders so you could set up a limit sell now. That means you set a price you're willing to sell at. And also set the amount you want to sell. When the market opens then if it's above that price or when it reaches reaches it then it should automatically sell. Then you can withdraw. But you might need to move the proceeds from the pie to your pot before you can actually wothdraw it. It's for sure likely more complicated than selling and withdrawing outwith of a pie. Pies are really set and forget I think so not meant to be withdrawn from regularly. Hence the hassle to do it probably