help me the control panel is skipped

Hi, I activated your theme, Newspaper X and in the control panel gives me: Fatal error: Call to undefined function is_customize_preview() in /home/mhd-01/ on line 20.
Help me…!!!


public function enqueue() {
	if ( is_admin() && ! is_customize_preview() ) {
		wp_enqueue_script( 'jquery-ui' );
		wp_enqueue_script( 'jquery-ui-slider' );
		wp_enqueue_style( 'epsilon-styles', get_template_directory_uri() . '/inc/libraries/epsilon-framework/assets/css/style.css' );
		wp_enqueue_script( 'epsilon-object', get_template_directory_uri() . '/inc/libraries/epsilon-framework/assets/js/epsilon.js', array( 'jquery' ) );

This is my page panel control…

Hey there

I need a temporary access, please use this plugin to create temporary access for us, its automatic login link and does not requires sharing your admin details. here is How To guide. at the and don’t forget about  “Set as private reply” at the bottom of the message box