Can't create new project due hidden field is required

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When I try to create a new project, I fill the form with the requested data (name, icon, environment), but when I click on "Create project" button, it displays a message saying "This field is required" on top of the button. My guess is that it refers to the platforms, as it says that I must select the ones I want the project for, but there is nothing I can add.

Thanks,

Jorge Araújo.