Dear Yannik,
As we can understand, it’s a 3rd party plugin conflict or your WordPress permalink issue. It’s not our plugin FoodBook issue. You could check out the FoodBook live demo as a reference.
To fix the issue please deactivate 3rd party plugins one by one to check which plugin conflicts with FoodBook.
Moreover, try to reset your WordPress permalink by following this article https://www.hostinger.com/tutorials/wordpress-broken-permalinks
Please Note: We will be on the Eid Vacation from 11 May 2021 and won’t be able to respond to support questions and email queries until 18 May 2021.
Best Regards,
ThemeLooks Support Team