Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "itpg_instagram_feed" not found or invalid function name in /home/indithem/demo.indithemes.com/wp-includes/class-wp-hook.php:324 Stack trace: #0 /home/indithem/demo.indithemes.com/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #1 /home/indithem/demo.indithemes.com/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #2 /home/indithem/demo.indithemes.com/wp-content/themes/it-photographer-plus/footer.php(16): do_action('itpg_footer') #3 /home/indithem/demo.indithemes.com/wp-includes/template.php(810): require_once('/home/indithem/...') #4 /home/indithem/demo.indithemes.com/wp-includes/template.php(745): load_template('/home/indithem/...', true, Array) #5 /home/indithem/demo.indithemes.com/wp-includes/general-template.php(92): locate_template(Array, true, true, Array) #6 /home/indithem/demo.indithemes.com/wp-content/themes/it-photographer-plus/archive.php(70): get_footer() #7 /home/indithem/demo.indithemes.com/wp-includes/template-loader.php(106): include('/home/indithem/...') #8 /home/indithem/demo.indithemes.com/wp-blog-header.php(19): require_once('/home/indithem/...') #9 /home/indithem/demo.indithemes.com/index.php(17): require('/home/indithem/...') #10 {main} thrown in /home/indithem/demo.indithemes.com/wp-includes/class-wp-hook.php on line 324