Cindy on "Shortcode in widget"

Hello everyone,

I am trying to add a contact page into my website which would include a contact form.

I am using the Contact Form Maker plugin, and use the shortcode it generates. I tried to include the shortcode into a text widget (into Sydney Page Builder). But the shortcode isn't working.

I have added into function.php following line: add_filter('widget_text', 'do_shortcode');

But it isn't working as well.

Can you please help me?

Many thanks!
Cindy