You need to Rebuild CSS whenever you are adding any new snippet in the page builder. There are two ways to rebuild CSS. Below we have Explained both of them.
Login to Backend
First Way
You can directly rebuild CSS from Store ➤ Configurations ➤ Brush Your Ideas ➤ Frontend Options, you will get the Rebuild CSS feature under the Rebuild Design.
Click on the Rebuild Css button, and your website will be updated with the new changes.
Second Way
You can also Rebuild Css from the page layouts. Once you save the page, you will get the pop up.
In the Pop-up, click on the “Click Here” hyperlink, and you will be navigated to the “Configurations” page in the new tab to Rebuild CSS.