Loft/ sweep2 - help

I would like to make a surface from this curve. ( for a last shoe).
I don’t know for some reason it doesn’t work.

help - loft.3dm (72.7 KB)
thank you for you help

the long longitudinal curves had to be split to create a surface from curve network:

foot_surface_curve_network.gh (44.6 KB)

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@inno thank you very much !!!