Please try these links:AmiKit 1.2.0 - Download location 1
(supports "resume" command)AmiKit 1.2.0 - Download location 2
(does NOT support "resume" command)
The first source should always work (even though it was reported it's unstable sometimes - in this case better use some download manager so you can always resume the download process).
The second source is the one that gives you unreadable error message. I have no idea what's wrong because it works perfectly when I try it from here. However if you install fresh 1.2.0, the Live Update archives are downloaded from this source. Please let me know if your Live Update doesn't detect any updates or if you experience any other troubles.
Sorry for the inconvenience.