Hello @Ahmed,
Have you populated the Observation Period table? I’m guessing that you can see the Person report in Data Sources, but all other ones are empty — this is because Person-related analyses in Achilles do not require a join to Observation Period, unlike other reports. Likewise, when you define cohort entry events, there’s an inner join to Observation Period in the generated SQL queries — you can check it by switching to the ‘Export’ → ‘SQL’ tabs in the cohort definition view.
Similar issue described earlier: Atlas now load info properly