Issue

When a child theme is active, the TypeRocket plugin will currently check the parent theme for override folders. This is because the function get_template_directory() will find the parent of a child theme if a child theme is active.

Source: get_template_directory() function

In the case a child theme is being used, the absolute path to the parent theme directory will be returned. Use get_stylesheet_directory() to get the absolute path to the child theme directory.

Solution

Use the function get_stylesheet_directory() instead as recommended by the above docs.