The dashboard displays historical information. Since your range is today there is nothing for it to display. If you pick the same date range tomorrow (7/2/2019) it ought to display stuff. Unless you have an actual problem. Please help us to help you by reading and following the posting guidelines located in this thread: Please read before requesting assistance. The more information you give us the better we will be able to assist you. Thank you.

Environment details?
Version of osTicket?