Support: http://kopatheme.com/forums/topic/error-when-installing-theme/

functions.php

<?php

define('KOPA_THEME_NAME', 'Nictitate');
define('KOPA_DOMAIN', 'nictitate');
define('KOPA_CPANEL_IMAGE_DIR', get_template_directory_uri() . '/library/images/layout/');
define('KOPA_UPDATE_TIMEOUT', 21600);
define('KOPA_UPDATE_URL', 'http://kopatheme.com/notifier/nictitate.xml');

require (get_template_directory()) . '/library/kopa.php';
require (get_template_directory()) . '/library/ini.php';
require (get_template_directory()) . '/library/includes/google-fonts.php';
require (get_template_directory()) . '/library/includes/ajax.php';
require (get_template_directory()) . '/library/includes/metabox/post.php';
require (get_template_directory()) . '/library/includes/metabox/category.php';
require (get_template_directory()) . '/library/includes/metabox/page.php';
require (get_template_directory()) . '/library/front.php';
require (get_template_directory()) . '/library/posttype/service.php';
require (get_template_directory()) . '/library/posttype/portfolio.php';
require (get_template_directory()) . '/library/posttype/client.php';
require (get_template_directory()) . '/library/posttype/testimonial.php';
require (get_template_directory()) . '/library/posttype/staff.php';
require (get_template_directory()) . '/library/posttype/options_client.php';
require (get_template_directory()) . '/library/posttype/options_testimonial.php';
require (get_template_directory()) . '/library/posttype/options_service.php';
require (get_template_directory()) . '/library/posttype/options_staff.php';
require (get_template_directory()) . '/library/posttype/options_portfolio.php';
require (get_template_directory()) . '/library/posttype/options_post_slider_bg.php';
require (get_template_directory()) . '/library/custom-menu/kopa_custom_menu.php';

/**
 * Jigoshop plugin configuration
 */
require_once (get_template_directory()) . '/jigoshop/jigoshop-config.php';


/**
 * Include the TGM_Plugin_Activation class.
 */
require_once dirname( __FILE__ ) . '/class-tgm-plugin-activation.php';

add_action( 'tgmpa_register', 'kopa_register_required_plugins' );

function kopa_register_required_plugins() {
	$plugins = array(
		array(
			'name'     => 'Jigoshop',
			'slug'     => 'jigoshop',
			'required' => false,
		),
		array(
			'name'     => 'Revolution Slider 4.0.4',
			'slug'     => 'revslider',
			'source'   => get_template_directory() . '/plugins/revslider.zip',
			'required' => false,
		),
	);	
	$theme_text_domain = KOPA_DOMAIN;	
	$config = array(
		'domain'       		=> $theme_text_domain,         	// Text domain - likely want to be the same as your theme.
		'default_path' 		=> '',                         	// Default absolute path to pre-packaged plugins
		'parent_menu_slug' 	=> 'themes.php', 				// Default parent menu slug
		'parent_url_slug' 	=> 'themes.php', 				// Default parent URL slug
		'menu'         		=> 'install-required-plugins', 	// Menu slug
		'has_notices'      	=> true,                       	// Show admin notices or not
		'is_automatic'    	=> false,					   	// Automatically activate plugins after installation or not
		'message' 			=> '',							// Message to output right before the plugins table
		'strings'      		=> array(
			'page_title'                       			=> __( 'Install Required Plugins', $theme_text_domain ),
			'menu_title'                       			=> __( 'Install Plugins', $theme_text_domain ),
			'installing'                       			=> __( 'Installing Plugin: %s', $theme_text_domain ), // %1$s = plugin name
			'oops'                             			=> __( 'Something went wrong with the plugin API.', $theme_text_domain ),
			'notice_can_install_required'     			=> _n_noop( 'This theme requires the following plugin: %1$s.', 'This theme requires the following plugins: %1$s.' ), // %1$s = plugin name(s)
			'notice_can_install_recommended'			=> _n_noop( 'This theme recommends the following plugin: %1$s.', 'This theme recommends the following plugins: %1$s.' ), // %1$s = plugin name(s)
			'notice_cannot_install'  					=> _n_noop( 'Sorry, but you do not have the correct permissions to install the %s plugin. Contact the administrator of this site for help on getting the plugin installed.', 'Sorry, but you do not have the correct permissions to install the %s plugins. Contact the administrator of this site for help on getting the plugins installed.' ), // %1$s = plugin name(s)
			'notice_can_activate_required'    			=> _n_noop( 'The following required plugin is currently inactive: %1$s.', 'The following required plugins are currently inactive: %1$s.' ), // %1$s = plugin name(s)
			'notice_can_activate_recommended'			=> _n_noop( 'The following recommended plugin is currently inactive: %1$s.', 'The following recommended plugins are currently inactive: %1$s.' ), // %1$s = plugin name(s)
			'notice_cannot_activate' 					=> _n_noop( 'Sorry, but you do not have the correct permissions to activate the %s plugin. Contact the administrator of this site for help on getting the plugin activated.', 'Sorry, but you do not have the correct permissions to activate the %s plugins. Contact the administrator of this site for help on getting the plugins activated.' ), // %1$s = plugin name(s)
			'notice_ask_to_update' 						=> _n_noop( 'The following plugin needs to be updated to its latest version to ensure maximum compatibility with this theme: %1$s.', 'The following plugins need to be updated to their latest version to ensure maximum compatibility with this theme: %1$s.' ), // %1$s = plugin name(s)
			'notice_cannot_update' 						=> _n_noop( 'Sorry, but you do not have the correct permissions to update the %s plugin. Contact the administrator of this site for help on getting the plugin updated.', 'Sorry, but you do not have the correct permissions to update the %s plugins. Contact the administrator of this site for help on getting the plugins updated.' ), // %1$s = plugin name(s)
			'install_link' 					  			=> _n_noop( 'Begin installing plugin', 'Begin installing plugins' ),
			'activate_link' 				  			=> _n_noop( 'Activate installed plugin', 'Activate installed plugins' ),
			'return'                           			=> __( 'Return to Required Plugins Installer', $theme_text_domain ),
			'plugin_activated'                 			=> __( 'Plugin activated successfully.', $theme_text_domain ),
			'complete' 									=> __( 'All plugins installed and activated successfully. %s', $theme_text_domain ), // %1$s = dashboard link
			'nag_type'									=> 'updated' // Determines admin notice type - can only be 'updated' or 'error'
		)
	);
	tgmpa( $plugins, $config );
}


// remove wordpress.org theme update of specific premium theme
add_filter('site_transient_update_themes', 'kopa_remove_theme_from_transient_update_themes');

function kopa_remove_theme_from_transient_update_themes( $transient ) {

	if ( is_object( $transient ) && isset( $transient->checked ) && isset( $transient->response ) ) {

		$checked = $transient->checked;
		$response = $transient->response;

		if ( isset( $checked['nictitate'] ) ) {
			unset( $checked['nictitate'] );
			$transient->checked = $checked;
		}

		if ( isset( $response['nictitate'] ) ) {
			unset( $response['nictitate'] );
			$transient->response = $response;
		}

		return $transient;

	}

	return $transient;

}