Thanks for your attention.
I am creating a process to convert Excel to PDF with Laravel.

I'm trying to create it using dompdf.

I am referring to the following site, but I can't do it well in the command section.
laravel-dompdf PDF in Japanese environment with version 7.0 environment Create

# php load_font.php ipag $path_to_font_directory/ipag.ttf

"Fatal error: require_once (): Failed opening required'vendor/autoload.php'(include_path ='C: \ xampp \ php \ PEAR') in C: \ xampp \ htdocs \ sample \ vendor \ dompdf \ dompdf \ load_font.php on line 3 "

I get an error with

I did not understand even after checking, so I will ask you a question.