Prompting to enter USERNAME and PASSWORD while downloading the kali linux 64bit iso

[Mad4kali]

Hi friends..
I am getting repeated alerts while I am downloading the 64bit of kali iso file. please let me know whats need to be enter....
download is completed 99.9% and struck... please help me.

Error.jpg

[V3ng3@nc3]

my friend just download it from here http://www.kali.org/downloads/ there are no alerts 101%