Hi Rose,
thank you for your help. I’ve upped the files in the corresponding directory.
Unfortunately, it didn’t fix the problem.
Any changes to the menu using megamenu are not saved.
In the Secondary menu, I would like to add a mega menu under “Collecties”, using static block “collecties_menu_item”, like this: https://prnt.sc/ryhba1
Can you please have a look, using the credentials I posted earlier?