TomWP

Can you be more descriptive? Can you give us a screenshot of the error?

In the style.css

Just remove it with some simple css.
#element {display:none}

The plugin is free. You can uninstall it anytime. You need to get the SpinRewriter API for it to be able to work. It is well documented in the plugin settings that you need the SpinRewriter API key and email. If you are not using SpinRewriter the plugin is not for you and it is unfair to leave a negative review just because It wasn’t what you were looking for.