Fill the gap between closed lines/Curves using surface

It might be a silly question.I’m trying to fill the gap between closed lines/curves with surface. So i started creating a plane surface over it and trimmed it but one side i got the result what i need to achieve but for the other side I’m facing the problem while trimming it i don’t know why it’s happening. Is there any solution to it.
I attached the rhino file too.surface in gap.3dm (74.4 KB)

Thanks in advance.

There are two curves that are not closed among your 5 curves.

Boundary (13.2 KB)

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Thank you so much @HS_Kim :heart: for helping me in solving this.