Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, non-static method dc_jqsocialstream::header() cannot be called statically in /data/web/e43980/html/prophecy/wp-includes/class-wp-hook.php:307 Stack trace: #0 /data/web/e43980/html/prophecy/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters() #1 /data/web/e43980/html/prophecy/wp-includes/plugin.php(476): WP_Hook->do_action() #2 /data/web/e43980/html/prophecy/wp-includes/general-template.php(3042): do_action() #3 /data/web/e43980/html/prophecy/wp-content/themes/essu/header.php(25): wp_head() #4 /data/web/e43980/html/prophecy/wp-includes/template.php(770): require_once('/data/web/e4398...') #5 /data/web/e43980/html/prophecy/wp-includes/template.php(716): load_template() #6 /data/web/e43980/html/prophecy/wp-includes/general-template.php(48): locate_template() #7 /data/web/e43980/html/prophecy/wp-content/themes/essu/single-kktfwp_portfolio.php(7): get_header() #8 /data/web/e43980/html/prophecy/wp-includes/template-loader.php(106): include('/data/web/e4398...') #9 /data/web/e43980/html/prophecy/wp-blog-header.php(19): require_once('/data/web/e4398...') #10 /data/web/e43980/html/prophecy/index.php(17): require('/data/web/e4398...') #11 {main} thrown in /data/web/e43980/html/prophecy/wp-includes/class-wp-hook.php on line 307