I am trying to: Access Appearance Features in my backend
I get the following error referencing Toolset.
WP Views
Fatal error: Uncaught Error: Call to undefined method Elementor\Utils::is_ajax() in /home/customer/www/ryang64.sg-host.com/public_html/wp-content/plugins/cred-frontend-editor/vendor/toolset/toolset-common/inc/autoloaded/interop/handler/elementor/widgets/view/view.php:376 Stack trace: #0 /home/customer/www/ryang64.sg-host.com/public_html/wp-includes/class-wp-hook.php(303): OTGS\Toolset\Common\Interop\Handler\Elementor\ViewWidget->maybe_use_view_elementor_widget_instead('') #1 /home/customer/www/ryang64.sg-host.com/public_html/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters('', Array) #2 /home/customer/www/ryang64.sg-host.com/public_html/wp-includes/plugin.php(470): WP_Hook->do_action(Array) #3 /home/customer/www/ryang64.sg-host.com/public_html/wp-content/plugins/toolset-blocks/embedded/inc/wpv-widgets.php(81): do_action('wpv_action_befo...') #4 /home/customer/www/ryang64.sg-host.com/public_html/wp-includes/class-wp-widget.php(534): WPV_Widget->form(Array) #5 /home/customer/www/ryang64.sg-host.com/public_html/wp- in /home/customer/www/ryang64.sg-host.com/public_html/wp-content/plugins/cred-frontend-editor/vendor/toolset/toolset-common/inc/autoloaded/interop/handler/elementor/widgets/view/view.php on line 376
There has been a critical error on this website. Please check your site admin email inbox for instructions.
It would appear that the user login isn't working. However I did replace the file on your site so can you please check again to see if the issue still remains.
In your case it was our Toolset Forms plugin as according to this line here public_html/wp-content/plugins/cred-frontend-editor/vendor/toolset/toolset-common/inc/autoloaded/interop/handler/elementor/widgets/view/view.php
On your other sites it may be the same so you will need to follow this path and replace the view.php file at that path.