Warning: Undefined array key “multi” in

  • Hi, I’m just starting to use your plugin which I’ll probably go pro. But now I have this error:

    Warning: Undefined array key “multi” in /srv/vhost/axixtix.com/home/html/wp-content/plugins/acf-frontend-form-element/main/frontend/forms/classes/form-display.phpon line 1780
    could you help me to solve it, thanks in advance

    The page I need help with: [log in to see the link]

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