Closed Comments bug still active

Posts are closed as a result of the MarketPress plugin. We updated the CoursePress pro plugin and, if we understand correctly, the new version now incorporates course payment capabilities and updates MarketPress, correct?

To see the closed comments error, please scroll down to the bottom of:

All plugins appear to be updated and we checked to ensure all other settings, such as WordPress' and Avada's (theme) are set to accept comments. We also did not turn off comments for individual posts.

How can we ensure comments are open for our posts? Can you upgrade for us?