Attesa theme is set to have up to 4 widgets columns in the footer.
You can choose how many widgets columns to show on your website from your WordPress Dashboard in “Appearance-> Customize-> Attesa Theme Options-> Footer Settings” and under “Number of footer columns” you can choose the columns (from 1 to 4).
Then, you can fill the columns of widgets from your WordPress Dashboard under “Appearance-> Widgets“.
You will have 4 sidebars for the footer (Footer 1, Footer 2, Footer 3 and Footer 4). Fill only the sidebars you’ve selected (example, if you have selected 3 columns, use only the first 3 sidebar footers).