Hello Francesco Bianchini ,
- How about clean the project through " Right click your project" -> Clean project :

then build it again by click "Build" button under "Quickstart Panel":

- If still can't work, add some code in your project, build .
- If still can't work , how bout SDK demo ?
- You can also show the steps you create new project, and send your new project to me.
Hope it helps,
Have a great day,
TIC
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