🇬🇷Greece @alexpertsi

Also an easy way to copy-reuse existing fields, is here Webforms>Build>Source Elements (YAML)
You could easy copy and paste the YAML code (also multiple fields)

#10 worked for me. Thanks!!!

PHPMailer SMTP ( https://www.drupal.org/project/phpmailer_smtp → )
It worked for me too! :)
Don't forget to follow its configuration instructions!
(e.q. the https://www.drupal.org/project/mailsystem → installation)

Use this javascript code

if(document.querySelector('.name-field-smedia')){
    let sliders = document.querySelectorAll('.name-field-smedia');
    for (var i = 0; i < sliders.length; i++) {
      let slider = new Flickity(sliders[i], {
        wrapAround: true,
        pageDots: false,
        imagesLoaded: true
      });
    }
 }

I had the same problem.

Go to -> Configuration -> Mailer -> Transport (/admin/config/system/mailer/transport)
Add Transport type (Transport tab) -> SMTP
Fill in the required input fields -> Save
and after click -> edit -> Set as default

After this steps my drupal send mails via "Drupal Symfony Mailer" module