This page contains the following errors: error on line 2 at column 1: Extra con

I tried installing and activating this plugin but it throws the following error.

This page contains the following errors:

error on line 2 at column 1: Extra content at the end of the document
Below is a rendering of the page up to the first error.

Although it says below is a rendering of the page there was no rendering

https://www.ads-software.com/plugins/easy-social-share-buttons/