Hi @ruenel
Thanks for getting back do me.
Unfortunately, error handling is very difficult. And there are many things that don’t work well yet. (at least for me). I know CS Forms is very powerful and complex, but for now it has not maxed out it’s potential in user-friendlyness.
How am I supposed to know that the date-format is invalid if it is shown correctly in CS? Why can’t I get a warning that it is not valid right away in Cornerstone?
Why is this happening for example?
How can I import a whole list off all countries at once without adding every single one one by one.
Not having any animation or loading progress when the form is submitting is also a no-go, because I dont even know if it’s actually submitting or not.
What I’m also missing is adding a hyperlink to the label of a check-box. And many other things.
But for now my biggest issue is the error handling and user fiendlyness. 
So I might stick to Fluent Forms for now and come back to CS Form in a few months when the biggest issues are sorted out.