i create my menu in the moment, the problem is that i cant save the mega menu anymore. It worked
well 4 times (the menu rows before). But now it switches back to dropdown everytime i want to save the mega menu.
thank you for the tips and links to this topic.
I solved the problem with the menu item limit. i created a new .user.ini and added a php code.
If anyone have the same probs in future, you can tell him exactly what to do.
My menu works fine now.