Design of Lifting Frame

Hi. Newbie in designing structural member here. I was supposed to design a simple lifting frame with 4 cables supporting the structure, but I kept on getting error report.

Can someone point-out on me what's wrong with my design. I actually tried to solve it by reading some forum here but no luck for me. It will be very helpful for me if someone can help me.

I attached the native file I'm working with.8764.Lifting Frame.STD

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