Hi,
Thanks for using the Events Calendar.
Here on the pre-sales forum, I’m afraid we do not provide technical support. I would ask that you take any technical support questions across to our wordpress.org forum – our staff scan it periodically and other community members may also be able to help out.
The Events Calendar
Having said that it is a bug due to a change in WordPress 4.5 and you do not need Pro for it to work.
We will release a fix for it later this week.
Thanks again!