Good evening Russell and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
We are sorry to hear about the messages you are getting while navigating between months after the last update. I would love to help you with this topic.
From what I can see, I have a couple of recommendations.
First of all, I would recommend tackling the Google maps API message from the Console in Google Chrome’s developer tools.
More specifically, you might be interested in:
- https://theeventscalendar.com/knowledgebase/setting-up-your-google-maps-api-key/
- Perhaps disabling your other Google Maps API plugin, at least for the Events Calendar pages and archives
Secondly, I am noticing that you are using an older version of PHP.
I would highly recommend (after a backup), upgrading to PHP 5.4+ (in fact WordPress recommends 5.6+).
Let me know how that goes.
Best regards,
Geoff B.