Bad Event Tracking Code

The latest version of this plugin causes a:

Bad Event Tracking Code

warning in my Google analytics account. The details are:

The Landing Pages report has a (not set) entry. Verify that tracking code for property My Web Site sends a _trackPageview hit and that it does this before sending any events.

Is this a known bug in the plugin?

https://wordpress.org/plugins/google-analytics-for-wordpress/