We are using this app to allow customers to customize apparel with their jersey number. I have unchecked the Require this field box yet nobody can add anything to their cart now because a little box pops up saying "Fill in this field" so they are forced to customize (at an uncharge) anybody experienced this?
Can you share a link to the page?
It's possible the app isn't doing what it is supposed to do so reaching out to the developer is a good start. Now if the app added code into your theme for this you may be able to self serve by adjusting some things. I would guess a "required" attribute has been added to the field and quick fix could be to just remove the attribute. Without seeing some code in your theme, or an example it will be hard to guide you much further.