Actually the latest Version you offer is not 6.4.5 its 6.4.6.
However, since Google has already contacted us about several errors (which are caused by this plugin), this problem should be fixed as soon as possible, as this will also affect the ranking of the page.
Since I have already contacted the MEC team about this and they informed me that the problem no longer exists in the latest version, it is up to you to take action (especially since you offer the plugin in your package and you also control the possibility to update the plugin).
As a customer, I therefore expect a quick solution, since it is 100%in your responsibility to release the update.
Looking forward to the possibility to update the plugin ASAP!
Regards.