admin/settings/event: Fatal error: Unsupported operand types

I have the same problem, with almost the same error message. I uninstalled the Event module and installed a new version without success. Don't do this...you will lose your event data (my dates/times are gone).

You can change Event settings (Administer) without going to the Task link. Try getting to Event through the "By Module" link. I can get to the Events overview and Timezone handling pages.

Good luck...sorry I can help you.

I don't see how this should be a bug in event module.

Your dates/times should still be in the database. Try to rebuild your menu.

Event for Drupal 8 is unrelated to older versions. If an issue similar to this one exists, please open a new issue with the 8.x branch.