"Cannot evaluate expression" error on Optimization Desmos

I’m trying to use a Desmos activity created by Gregg Klein (I believe) that I have assigned in the past with no issues. However, now the “Submit” button has turned into an “Unlimited Attempts” button. As I try to type in the correct expression I get a “Cannot evaluate expression” error and cannot even submit what I typed. Does anyone know how to fix this or possibly have the link to the original file that they can reshare?

Thank you.

Here’s the author → @mrkleing

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in the CL for each studentInput, type the following

errorMessage: “”


This is a breaking change Desmos made on their end sometime about a couple months ago.

Why it was changed I’m not sure but it’s affected many activities

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