Invisalign i7

Fatal error: Uncaught Error: Call to undefined method WP_Error::has_errors() in /websites/in/inlineortho.com.au/wordpress/wp-admin/includes/file.php:1766 Stack trace: #0 /websites/in/inlineortho.com.au/wordpress/wp-content/plugins/so-widgets-bundle/base/siteorigin-widget.class.php(824): WP_Filesystem() #1 /websites/in/inlineortho.com.au/wordpress/wp-content/plugins/so-widgets-bundle/base/siteorigin-widget.class.php(287): SiteOrigin_Widget::clear_file_cache() #2 /websites/in/inlineortho.com.au/wordpress/wp-content/plugins/so-widgets-bundle/base/siteorigin-widget.class.php(180): SiteOrigin_Widget->generate_and_enqueue_instance_styles(Array) #3 /websites/in/inlineortho.com.au/wordpress/wp-content/plugins/siteorigin-panels/inc/renderer.php(555): SiteOrigin_Widget->widget(Array, Array) #4 /websites/in/inlineortho.com.au/wordpress/wp-content/plugins/siteorigin-panels/inc/renderer.php(873): SiteOrigin_Panels_Renderer->the_widget(Array, Array, 0, 0, 0, true, true, 1201, '') #5 /websites/in/inlineortho.com.au/wordpress/wp-content/ in /websites/in/inlineortho.com.au/wordpress/wp-admin/includes/file.php on line 1766