Question / Problem:
Why am I getting a "Block length does not match with its complements" error when importing a KTA Package?
Answer / Solution:
This error indicates that there is a problem inflating a compressed file. Use 7Zip->Test Archive (or similar) to test the zip file and it's contents to verify the problem.
The solution is to recreate the Package again. Most likely, this was a one time glitch that happened when creating a zip file in one of the sub-folders.