Area Targets Test App Hololens 2 dataset not loading

Hello,

I followed the steps written in the online guide Area Targets Test App for Hololens in order to test an area target I generated from an iPad using the Vuforia Creator App. I built the project, started the app, uploaded the .dat and occlusion.3dt files but when running the app there is no one dataset active.
Am I missing something?
Can you help me solving this issue?

Thank you