Having problem with Convex.jl

Welcome!

The error message in the screenshot makes it look like you have a very old version of Convex.jl; that references MathProgBase which we stopped using in Convex a few years ago.

How did you update? Try

using Pkg
Pkg.add(PackageSpec(name="Convex", version=v"0.14.5"))

If you get an error, copy the whole message here.

Also, please read this post: Please read: make it easier to help you.

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