Hi,
If you are using the Multi-branch add-on then you don’t need to add a single branch location. Because the single branch location option works for a single branch only, not work for Multi-branch.
In this case, you need to create branches from FoodBook -> Branches
and add the location for each branch from the branch. Please check this out https://themelooks.net/documentation/plugin/foodbook/from-where-you-would-create-branch/
Best Regards,
ThemeLooks Support Team