The answer on what you should do is right there within your question: "If this problem persists, please contact Blizzard Technical Support."Visit here to get more information Raspberry Ketone Supplement
on 07/04/2012 – Made popular on 07/04/2012
The installer was unable to read the file "Z:\home\balmung\Warcraft III 1.21b ROC Installer enUS\Warcraft III 1.21b TFT Installer enUS\Installer Tome.mpq". This error may be caused by problems with the media or drive at Z:\--for example, a scratched or dirty CD-ROM/DVD-ROM, hard drive corruption, or a networking problem while downloading the installer.
Since I found this thread on google with the very generic "set xdg-email" as fourth hit, I shamelessly necrobump it with further information, since the exact same problem still persists.I somewhat solved this, by inspecting the scripts /usr/bin/xdg-open and /usr/bin/xdg-email. They both refer to an application called "x-www-browser".