Breaks wpMandrill

I updated to version 5.0.2 and wpMandrill stopped working with the following error:
Mandrill: wp_mail has been declared by another process or plugin, so you won’t be able to use Mandrill until the problem is solved.

So, I deactivated the plugin and the error message was gone.
I have switched back to v4.3.5

https://www.ads-software.com/plugins/google-analytics-for-wordpress/