Mobile menu always expanded

Using echo template, i can't get the navigation menu to be collapsed on mobile devices. It is always expanded.

Where is the trick?

This section can only be seen by users with a valid subscription.
If you have a valid subscription, please login now

Support is

It is currently a weekend from where we are at. Some answers may already be available on our documentation

Rest assured that we will get back to your posts as soon as the week starts!

Your time
Stack Ideas time