I stil face the same issue : I use WP 4.6.1 and Event Manager 5.6.6.1.
Another problem : I cannot make reservation : the form shows and I may fill the fields but nothing happens when I click the button. Everything used to work fine but since April this year, it doesn’t work anymore.
I have changed the template and desabled every plugins, I doesn’t work any better.
Thank you very much for your help