WP_Error on recurring events

I have a list of recurring events and when I click on my “regular” events page, I get the following error next to the the title of the only one event that’s displayed:

Recoverable fatal error: Object of class WP_Error could not be converted to string in event-option.php on line 81

The event that was shown is a recurring event and there are no other recurring events showing underneath it.

I’ll probably go in to the code and see if I an fix it myself but I thought I’d just put it out here in case there are others with the same problem.

I’m using the latest update of the plugin: 5.9.5