Hi Jade,
Yes I have it working. I am the site-wide administrator too.
Make sure you are an administrator of the Intranet. Also, look in the Teams group. You should be an administrator (as opposed to member) of the group for which you wish to create a ticket.
I also have a number of people who are nnot site-wide admins who can add tickets, create trackers, etc... That is going to be the true value for me. I don't want to have to do all of the administrative work.
I'd like to see some sort of matrix made to let everyone know what groups are needed for which tasks. Maybe I'll start working on something like that.
Good luck Jade! Let us know if you get it all figured out.