Regular expression for field validation doesn't work

Hi,
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I have the lastest version of chronoforms v6 installes on my website and this bugs is still happening: https://www.chronoengine.com/forums/posts/t104524/cf-6-0-13-regular-expression-for-field-validation-doesnt-work
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The regular expression is working OK before cliking "submit" button (javascript mode) BUT, cliking "submit" button, the field doesn't pass the validation.
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Is there a solution, please?

Thanks.

What's your regex string and which validation isn't working

it works fine here, /test/
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if you want to skip the regex check on server side then you will need to enable the "optional" setting!

Hello, use this: [a-zA-Z\s], not work, not send email

did you try /[a-zA-Z]/
?