The version of select2 used by the events calendar conflicts with the version used by Woocommerce, creating a JS error on the Woocommerce admin product editor screen.
This should be fixed on the events calendar side. You should only load select2 on the events calendar admin screens.
I marked this thread as Pending Fix, which means it should receive a reply once the applicable fix has been released. I cannot guarantee when it will be fixed as it’s in the development team’s hands now. They need to assign it, code it, test it, and schedule it for release.
I apologize for this issue and appreciate your understanding and patience.