Today i’ve bought “hell’s rebels-music” but, when i try to download it, download doesn’t start because it “failed to retrive manifest”, how can i fix this?
Hi @messinatommaso1 did you purchase it through the Google Play Store? The reason for the error is because the server does not list you as owning the set, it does however show you as buying “Dragon Battle” twice"?!
So I have just activated it for you now as you only need one Dragon Battle 
Any more problems with it then message us at support@Syrinscape so we can take a closer look for you