How do I get rid of the dotted line on blog posts?

Hello everyone, when I post something on my site there’s a dotted line that I can’t seem to get rid of. Does anyone know how to get rid of it? The dotted line always is below the first paragraph.

Hello there,

I hope you are doing well today.

You can use the following CSS code to remove the dotted line by going to Appearance > Customize > Additional CSS and pasting it there.

/*Remove dotted line*/
.single-post .entry-content p:first-of-type, .page .entry-content p:first-of-type {
    border-bottom: none;
}

If that does not work, please provide a link to your website so that I can inspect it?

Best Regards,
Support