Hi @ratih.syabrina : sorry to hear you’re having problems.
Can you try recreating this issue on one of our demo instances (e.g. DHIS 2 Demo - Sierra Leone), and let us know what version of DHIS2 you are using?
I do not see any additional authority checks within the WHO Data Quality App, so a user who has the “WHO Data Quality Tool app” authority should be able to open the app. The user will not be able, however, to see visualizations / generate reports unless they have permission to view the underlying data.