Type Helper methods that work fine in Delphi often give "illegal qualifier" even when you can clearly see the IDE resolving them without issues.

[slightlyoutofphase]

One such example here. This might be a stock FPC bug. Either way it should work but it simply doesn't.

[fibodevy]

function TwbContainer.UpdateMemoryOrder(out aMemoryOrderElements: TArray<Pointer>): Boolean;

->

function TwbContainer.UpdateMemoryOrder(out aMemoryOrderElements: TDynPointerArray): Boolean;

Does it help?

Definitely a stock FPC thing, not related to Unleashed at all.

[fibodevy]

Update your compiler to the devel branch and check if it works correctly there.