Hi,
Thanks for reaching out to us! I would be happy to help you 🙂
You would only be able to enable Community Tickets when WooCommerce is active. However, it should not require that Tribe Commerce be deactivated. Community Tickets will not work with Tribe Commerce, but as long as WooCommerce is there, it will always use that.
The Enable Community Tickets checkbox should be a little bit further down that screen you showed me. When you enabled Tribe Commerce, did you deactivate WooCommerce?
Cheers,
Jeremy