A required download is missing

I wanted to reset my laptop.

I went to disk utility and erased the Mac OS extended (journaled).

To complete the resetting process.

My MacBook Pro has version OS X Yosemite

to set up the installation of OS X 10.10,click continue.

I click continue then it says To download and restore OS X,your computer’s eligibility will be verified with apple.

I press continue and a message pops up

A required download is missing.

now I am stuck.

can anyone please help me .

Thank you