Ok I did it!
The problem was actually with the uploads folder permissions. I changed it to 777 and now everything it’s ok!
Thank you anyway!
Yes I am,
But I’ve just camed here to say that I could fix the error! Thank you very much!
For future users: I had changed the options to put a static page “Home” and the Blog page as dynamic but there was no need for that!
Asteria is simple and intuitive like that!!
Thank you again!