Class 'my_widget' not found in widget.php

[kalenjohnson]

Is your function or hook not working in Sage? Read this

If you’re getting an error about call_user_func_array(), chances are you are trying to use a function in the lib directory as a hook or filter and are not passing the namespace along with it. Please read this blog post to get an idea of what namespaces are and how to use them:

add_action( 'widgets_init', __NAMESPACE__ . '\\wpb_load_widget' ); is correct, you’re passing the namespace.

class my_widget extends \WP_Widget is correct, you need to make sure PHP is looking for WP_Widget in the global namespace.

register_widget( 'my_widget' ); missing namespace