Problem with Footer!

Hey! I'm a front-end dev but I have no experience with Wordpress, so and I wanted to add Instagram and Pinterest link in my footer, so I tried to edit the site-info.php file in the template parts, which correspond to the code of the footer. Suddenly, the browser closed and now the file is empty and so I have no longer have a footer to my website. This is a problem for the copyright, please get back to me as soon as possible, here is a screenshot to show what happened!