fix: check if get_current_screen is an object

Naprawa błędu który wypluwa jedna z wtyczek

Fatal error: Uncaught Error: Call to a member function is_block_editor() on null
in /var/www/html/wp-content/plugins/dropshipping-export/vendor_prefixed/wpdesk/wp-notice/src/WPDesk/Notice/Notice.php on line 86
Call stack:
DropshippingExportVendor\W\N\Notice::isBlockEditor()
wp-content/plugins/dropshipping-export/vendor_prefixed/wpdesk/wp-notice/src/WPDesk/Notice/Notice.php:176
DropshippingExportVendor\W\N\Notice::addGutenbergScript()
wp-includes/class-wp-hook.php:308
WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:332
WP_Hook::do_action()
wp-includes/plugin.php:517
do_action()
wp-content/plugins/woocommerce-memberships/vendor/skyverge/wc-plugin-framework/woocommerce/admin/abstract-sv-wc-plugin-admin-setup-wizard.php:326
SkyVerge\W\P\v\A\Setup_Wizard::render_page()
wp-includes/class-wp-hook.php:308
WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:332
WP_Hook::do_action()
wp-includes/plugin.php:517
do_action()
wp-admin/admin.php:175
require_once()
wp-admin/index.php:10

src/WPDesk/Notice/Notice.php

@@ -101,7 +101,9 @@ class Notice
 			require_once ABSPATH . '/wp-admin/includes/screen.php';
 		}
 
-		return \get_current_screen()->is_block_editor();
+		$screen = \get_current_screen();
+
+		return is_object($screen) ? $screen->is_block_editor() : false;
     }
 
     /**