"Uncaught Error: Call to undefined function WP_Bootstrap_Navwalker()" error?

Question

WordPress

How to fix the error, like I did everything as described in the documentation.
Downloaded file from github

Connected this file to functions.php

/**
 * Bootstrap nav walker.
 */
if ( ! file_exists( get_template_directory() . '/class-wp-bootstrap-navwalker.php' ) ) {
  // file does not exist... return an error.
  return new WP_Error( 'class-wp-bootstrap-navwalker-missing', __( 'It appears the class-wp-bootstrap-navwalker.php file may be missing.', 'wp-bootstrap-navwalker' ) );
} else {
  // file exists... require it.
  require get_template_directory() . '/inc/class-wp-bootstrap-navwalker.php';
}

I'm trying to call a class via var_dump in header.php

Connected header via get_header() in index.php
How to get rid of the error?

Answer 1

As far as I understand, one needs to create an instance of the class, not just call it as a function.
what you have written below new WP_Bootstrap_Navwalker();is exactly what you need.

Answer 2

Все разобрался.
В этом коде
перед class нужно прописать /inc/class-wp-boot....