First review the prompts you have selected. If no records meet the criteria you've selected, you’ll see "No Data Available." If possible, choose prompt values that will be less restrictive and review the output before attempting more restrictive selections.
For reports containing HR, finance, or faculty data, your fine grained access (which controls what data you can see, separate from which reports you can see) may not have been set up correctly.
Please submit a ticket and indicate which report you are not seeing any data for.