How to fix 'end of central directory' error in k-flash?

The firmware you downloaded is not correct, that is, The file is incomplete and wrong. (e.g. The correct firmware is up to 9MB, but the firmware you download is only 66KB.) It may caused by the unstable network or other matters. Please download it from the github again.

https://github.com/HuskyLens/HUSKYLENSUploader