Hi Kris,
Thank you for your reply!
I’ve checked this setting and it appears that it was not enabled. I then tried to turn this option on, update this setting and then turn it off again. Then for both actions a popup appeared saying “Something went wrong while saving your form. Please try again.” It appears that some settings cannot be saved.
Then the next problem unfortunately arises. When I want to export a form, I get a popup with the text “export form” but nothing else happens.