Window modal vs form

Hi everybody how are you? Maybe someone can help me.
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I need to have a modal window, but several things are not working well.
In custom everything is disorganized. And dynamic dropdowns don't work.
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I change the option to form and if they work for me, but the modal window stops working.
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app type=Form
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App type=Custom
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What can I do to solve this ???
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In chronoforms7 is this already solved?

you better try with v7, and you should have everything working first before testing the modal!