Hey Marfuse,
According to the errors listed, your project names are too long, or the filepath involved. Try abbreviating some of the words used.
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2015.11.03-10.07.20:461][ 0]LogInit:Display: CookResults:Error: Error Couldn't save package, filename is too long: D:/Projects/Unreal Projects///Content//Materials/buildboards/pitti-uomo-watchanish-edelberg-dinner-style-fashion-watches-horology-menswear-brands-suits-luxury-3.uasset
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2015.11.03-10.07.20:461][ 0]LogInit:Display: LogCook:Error: Couldn't save package, filename is too long :D:/Projects/Unreal Projects///Content//Materials/buildboards/pitti-uomo-
MainFrameActions: Packaging (Windows (64-bit)): watchanish-edelberg-dinner-style-fashion-watches-horology-menswear-brands-suits-luxury-3.uasset