Xcode installation error, an error occurred while javascript prompt assessment package

I installed the black apple, the system no problem. But that can not be installed XCODE, javascript error when prompted assessment package.
Impatient ah, online master ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
Reply:
See Xcode version is compatible with the system
Reply:
Thank you for your reply, not the problem.
Reply:
Friendly Bangding