Hi Andrea

You appear to have a certificate issue with your site as it is giving us a 'Potential Security Risk Ahead' warning.

May I suggest sending temporary administration access to your Joomla installation to info@joomla51.com and we will examine this issue further. For our reference please paste a link to this post in your email.

Ciaran

Thank you Andrea

Your mobile submenu items appear to be opening without any issue however because of the background color, it is difficult to see the toggle arrows. To amend try adding the following to the Custom CSS field of your templates parameters (Extensions -> Templates -> [YourTemplateStyle] -> Custom CSS)....

.mm-spn.mm-spn--navbar ul::before,

.mm-spn a:not(:last-child)::after,

.mm-spn li::before, 

.mm-spn li::after {

    border-color: black;

    opacity: .5;

}

The above CSS will change the lines and arrows to black which will contrast better against your yellow background (edit to taste).

Ciaran

Hi Ciaran,
everything is working great with border-color: blue;
;-)

thankyou.
Andrea