Qt creator missing structure tree

Hello Community,

I want to develop the px4 software within Qt creator. I followed the steps from the guide and I have no errors. I was able to start a simulation and the software successfully uploaded to a Pixhawk. Although when I open the project in the Qt creator, it doesn’t divide the files into the tree structure. All files are shown within one folder (Example seen in picture).

I am using Qt creator 5.5.1 on macOS 10.12.

Am I missing a setting within Qt or is there a cmake setting I have to make?

I’ld be very thankful for ideas to fix this issue.