You have not defined a function called display_facebook_element, at least you did not include that in the code posted. Thus, you are getting the error. display_facebook_element isn’t a valid callback. It doesn’t exist.
Related Posts:
- Redux callback action
- Color Options from Theme Customizer API not returning via get_theme_mod()
- Best practices for a Style/CSS based theme options page?
- How to use media upload on theme option page?
- Add a page outside of the current theme?
- Remove action within a class in a parent theme from the child theme
- Switch Theme Through Options Panel
- How to make alert for new version on theme options?
- How to mark an option as selected
- Theme Customizer – How to create a sub panel
- Delete database tables on theme uninstall?
- How can I show more than 15 themes at a time in the admin menu?
- How to go about pre generating css file with variables from theme options
- How to trigger function on theme delete?
- Does uninstalling a WordPress theme delete its database values?
- Cannot find the code for “Edit This” link in posts in a specific theme
- Defining different theme for Blog posts page
- How to set different settings for a mobile theme?
- Disable Theme API / Front end (for API only environment)
- What’s the proper way to include inlined javascript-source?
- How to understand a specific bit of WordPress syntax
- Should a child theme share the same theme options row as the parent, or should it have it’s own options row?
- Creating a theme options page
- How Do I Use A Custom Mobile Theme?
- How can I make some themes usable only by admins?
- Custom options below pages/posts editor?
- How to display message (with switch_theme hook) after deactivating My theme?
- What hook is the currently active theme’s functions.php file loaded on? [duplicate]
- Preserve theme settings when migrating from local to live
- Functions containing parameter ‘yourtheme’
- What is the “pub” theme? [closed]
- Is it good practice moving the main stylesheets after the plugin styles?
- Passing dynamic options from backend to frontend
- Issue with theme mod options during domain migration
- .PO file is found but I don’t see translations: how to debug the problem?
- How to add some php code in header.php using plugin
- WordPress activate theme error $pagenow
- Setting a new default template for the creation of a page
- Cannot update a file for my theme
- List of categories instead of dropdown menu selector in admin options
- Fix warning: Missing argument
- Switching among theme customizations
- how to create a section inside a section with theme options customizer
- WordPress Customazation API section in section
- Are immediately-called actions not usable in themes?
- How to remove the option data of a theme when that theme is removed?
- Create /archive page in WordPress Theme
- Where can I find the “add_action()” inside a theme?
- Church hope them issue
- Is there a way to enable horizontal margin for a specific block element?
- W3 Total Cache, CDN and theme files [closed]
- Dynamic template serving, change theme_root using add_filter from current theme
- How to use same theme template for multiple taxonomy terms?
- Copying theme from Localhost to Live does not copy all theme settings with it?
- Making the Header on the Twenty Ten Theme Less Tall?
- Register theme customizer settings when theme activates [duplicate]
- hfeed CSS class in Twentyeleven Theme
- Which is the most well coded and semantically correct naked/blank WordPress theme (based on WordPress coding standards)?
- How to change the themes “Live Preview” url within the Appearance->Themes page?
- How Can I Create a List of Values to Be Iterated Through via WordPress Customization API?
- How do I apply my CSS to a theme page?
- How to get the post-ID in my plugin?
- Parallax WordPress theme without hardcoding – possible?
- Embedded Videos (PB) – Not Available
- Recommended Themes for a Developer-related Topics Blog?
- Upgrading from 2.9.4 to 3.0.x and with a custom theme
- Unwanted edit link on front page
- Need help with making a website where user can add products
- Can I change the WordPress default color?
- Enqueue custom css file on specific page
- How to put single-***.php in a specific folder?
- Using JQuery to check for Rel Attribute of Image before Overriding It
- Is a very simple theme secure enough?
- New WordPress Theme Not Showing in Blog
- Remove Commenting on Certain Pages
- Theme seems to have different options on wordpress.com and own-server install
- how would I change background color of a theme using a plugin?
- Dynamically switch file in get_template_directory_uri() | Function [closed]
- How i can put on my wordpress the demo of a theme?
- WordPress keeps switching back to empty template
- Best way of creating a website with multiple themes/languages
- Website Theme Flickering in Chrome
- style.css of my custom theme is not being applied at all
- how to edit homepage
- WordPress Dashboard Problem [closed]
- theme continuous deployment from bitbucket to windows azure
- Changing themes on locally hosted webpages
- What is the template file for topic layouts in bbPress?
- Showing wordpress theme demo at front end
- Moving WordPress with Super Skeleton theme
- A problem with functions.php file on my WordPress site
- hardened wordpress linux install
- How do I remove the dash (-) between my Site Title and Tagline?
- WordPress Theme redirects to the Index page – Theme customizer problem
- Obtaining the original unchanged Theme [closed]
- How to assign posts to different themes? [closed]
- Using AJAX to Update WordPress Theme
- Workaround AJAX calling without directly calling WordPress backend (Admin dashboard) because it is restricted to the end user (the public)
- Installation échouée : Le téléchargement a échoué. No working transports found
- How to create a new theme from an existing incomplete theme folder?