Listing Files From a Folder seem not working!

I’m on Windows, 3.7.4
Until Lesson “You can see the files, listed on the page:” all was ok
even the tags fields choosed are orange ( instead blue?)

At the end only Table Header is generated.

PS:I’m a new user and i currently test WAPPLER possibilities, and i really want to buy a professional Licence soon as possible

Cheers all