The main function of this file is to create the shortcode [mb_frontend_dashboard], you can copy the content in the file Dashboard.php to the file functions.php in the theme folder then change the name of the class, shortcode, URL ... to create your own shortcode and show on the page.
instead to put the content from dashboard.php into the functions.php, I want to put it in Code Snippet Plugin.
Question: Have I to copy the whole content of dashboard.php? If yes, after doing so, I get an 403 Forbidden after saviing the snippet.