[Plugin: Event Calendar 3] Beta version conflicts with Organize Series Plugin

I installed the latest beta version to test all the great new features that come with it. I love it but there seems to be a conflict with the Organize Series WordPress Plugin.

Link to the Plugin: https://unfoldingneurons.com/neurotic-plugins/organize-series-wordpress-plugin

Link to the Forum discussion: https://unfoldingneurons.com/forums/topic/page-not-found-everything-except-listing-of-series-works

Apparently, I’m not the only WP user who uses those two Plugins together. Does someone on the list here know of this issue or maybe even have a fix for it?
Thanks for your help.