In the simple site of our association (quadrantearte.it) we use the beautiful theme Astrid (free) and the plug-in “Max Mega Menu”.
I’m the administrator and I’ve noticed that, while on PCs the display of the menu is regular, on tablets and cell phones, instead of the little lines symbol of the menu, an exclamation point and a question mark appear and blink.
It’s clear that they are signaling me an error but I don’t understand how to solve it.
Can you help me? Thank you.