Hi @LCaynar
This might be because of apps not being updated. What is the version of the DHIS2 instance that you are using? If you are using a DHIS2 version older than the latest supported versions mentioned here (https://dhis2.org/releases/) then you will need to update please.
Additionally, would you please check in the App Management app that the Dashboard app, Line Listing app, Maps app, and the Data Visualizer app are all up to date. After updating these apps, please use the Data Administration app then in Maintenance view clear application cache and reload apps. You might also need to run the Analytics Tables export.
Once all that is complete, use Guest Mode in your browser and try the steps above again.
Please post back on how it goes. Thanks!