Error The upgrade package seems to be broken. Please try to download it again

I try to upgrade from 21.4 to 2.2.1 and receive this. Does anyone know?[color=#9C3535][font=Arial, Helvetica, sans-serif][size=3]

Error[/size][/font][/color][color=#9C3535][font=arial, verdana, arial, helvetica, sans-serif][size=3]

The upgrade package seems to be broken. Please try to download it again[/size][/font][/color]