Unwanted images appearing in navmenu

[cialalemany]

Hi everybody,

Adding a navmenu widget in my page, an unexpected square black image with "+ -" in appears under eyery item that points to a submenu. The ones circled in red in te image:

It happens in vertical and dropdown menu layout only under items with submenus. Don't know what they are for, but they keep there in published page and I obviously don't want them there.

I don't know how to remove them or prevent them from appearing. Any help please?

 

[cialalemany]

Stuck in this...

nobody can help me?

 

[cialalemany]

I answer myself, maybe it can help someone else.

Elementor pro's navmenu widget is not working properly in Twenty twenty one theme. Changing to Elementor Hello theme solves the issue.

Where can we find any documentation or guide to know wich themes work well with Elementor pro?