Task Manager Application (Pro) User right issues

Hi,

I am currently using the Task Manager Application (Pro) as a trial and I am confused on how to set privileges correctly.

The goal is to only have one group being able to see and use the extention at full scale. Right now I have the permissions set so only my IT-group has full access. However, my IT-group is not able to see any tasks or use the Gantt Diagramm. Only the dedicated superadmin is able to.

Thank you in advance and best regards,

Lukas