Hi Yvonne,
I’m sorry that you aren’t able to move tickets, but I’ll be happy to help you get this resolved!
As a first step, can you please try updating to the latest versions of The Events Calendar (4.6.9), Event Tickets (4.6.3), and Event Tickets Plus (4.6.2)? If you don’t see a prompt to update in the Plugins section, you can do so manually by following these instructions.
Since the versions you’re currently running are a bit older, I would recommend making these updates first in a staging site. If you don’t have one, the free WP Staging plugin will let you create a quick copy of your live site that you can use for testing.
Please let me know if this works!
Thanks,
Jennifer