Ticket #60578: 60578.diff

src/wp-admin/includes/class-file-upload-upgrader.php

@@ -72 +72 @@
                         if ( 'pluginzip' === $form || 'themezip' === $form ) {
                                 if ( ! wp_zip_file_is_valid( $file['file'] ) ) {
                                         wp_delete_file( $file['file'] );
-                                        wp_die( __( 'Incompatible Archive.' ) );
+
+                                        if ( 'pluginzip' === $form ) {
+                                                $plugins_page = sprintf(
+                                                        '<a href="%s">%s</a>',
+                                                        self_admin_url( 'plugin-install.php' ),
+                                                        __( 'Return to the Plugin Installer' )
+                                                );
+                                                wp_die( __( 'Incompatible Archive.' ) . '<br />' . $plugins_page );
+                                        }
+
+                                        if ( 'themezip' === $form ) {
+                                                $themes_page = sprintf(
+                                                        '<a href="%s" target="_parent">%s</a>',
+                                                        self_admin_url( 'theme-install.php' ),
+                                                        __( 'Return to the Theme Installer' )
+                                                );
+                                                wp_die( __( 'Incompatible Archive.' ) . '<br />' . $themes_page );
+                                        }
                                 }
                         }