Do you want this query to return results for a single ticket ID or for multiple IDs in a single query?
"Group by" suggests multiple ticket IDs, but your use of TicketID_fk = ? indicates that you only want this count for a single ticket ID.
Thus I think that you want to remove that Group BY clause if I am interpreting your post correctly.
Nevermind. I got to work in a different way by creating another field on a different layout by do this query.
SELECT (COUNT (Resolved_Ticket_Count))
WHERE Status=? AND Resolved_Ticket_Count > 1"
;" - "; ""; "Resolved")
At first I was going to attempt to list values > 1, then with this second field do a count. This way works also.