A point in the grid is null

I am trying to follow this tutorial but with a different form for the base : Triangular Net Pavilion Rhino Grasshopper Tutorial - YouTube
But when I try to do “surface from points”, I have a message error “a point in the grid is null. Fitting operation aborted”.
plateau.gh (4.5 KB)

Your geometry is not internalized.

Ok thank you but I don’t know how can I internalize ?
I am new using grasshopper

3. Attach minimal versions of all the relevant files

plateau.3dm (2.9 MB)
plateau.gh (18.4 KB)

Have a look at the attachment.

plateau_re.gh (23.7 KB)

Thank you very much ! It worked but there is still a little problem. Indeed, in the video (around 5:50) when he puts the list item, holes appears, but when I do it, it only works for on circle.

I tried to do the same thing with a flat surface and it works so I don’t understand why it doesn’t with the curvy surface
plateau_re.gh (39.4 KB)

plateau_reV2.gh (34.1 KB)

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