Fatal error: Uncaught Error: [] operator not supported for strings in /home/diagnosis/ftp/quiz/wp-content/themes/az/includes/admin/theme-js.php:125 Stack trace: #0 /home/diagnosis/ftp/quiz/wp-includes/class-wp-hook.php(286): df_customizer_options_output_js('') #1 /home/diagnosis/ftp/quiz/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array) #2 /home/diagnosis/ftp/quiz/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /home/diagnosis/ftp/quiz/wp-content/themes/az/includes/admin/theme-js.php(31): do_action('df_add_javascri...') #4 /home/diagnosis/ftp/quiz/wp-includes/class-wp-hook.php(286): df_add_javascript('') #5 /home/diagnosis/ftp/quiz/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #6 /home/diagnosis/ftp/quiz/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #7 /home/diagnosis/ftp/quiz/wp-includes/script-loader.php(1435): do_action('wp_enqueue_scri...') #8 /home/diagnosis/ftp/quiz/wp-includes/class-wp-hook.php(286): wp_enqueue_scripts('') #9 /home/diagnosis/ftp/quiz/ in /home/diagnosis/ftp/quiz/wp-content/themes/az/includes/admin/theme-js.php on line 125