after upgrade to fedora 20 error with grub file missing

[Rafnews]

Hi,

after upgrading fedora 19 with fedora 20, i got the following error 
message with grub is loading:
Welcome to GRUB!

error: file '/grub2/locale/en.mo.gz' not found

how is it possible after using fedup --network 20 to upgrade  (in VMWare 
worstation) ?

thx