Because you still do not config for WPBakery Page Builder plugin.
Go to WPBakery Page Builder > Role Manager > Select for the Post typs is Custom then tick on the boxes that will be the pages you want to edit with WPBakery Page builder: http://prntscr.com/nu6nbk and SAVE
I dit it for you and now you can edit your footer builder to change the logo.
If you are satisfied with our support, would you please spend a little time to give us a good review + 5 stars on website https://themeforest.net/item/ocolus-multipurposes-woocommerce-theme/reviews/22962624. It's really very worth with me.
Pls check your site then let me know result