1st, make sure you're using the latest version of CB2026, you can download/install the setup file for it from your online account here: https://www.comicbase.com/mycb/Registrations.aspx
Restart your computer. Upon restart, regenerate the reports you're having trouble with.
If they don't show up after about 15min from the point you upload them, let us know. Also describe the steps you do specifically to generate the report so we can replicate (to help us pin down any bug).