It looks like your system doesn't support symbolic links, so the assets were installed by copying them.
Installing eZ Publish legacy assets from C:/Users/IEUser/ezpublish-community/ezpublish/../ezpublish_legacy using the symlink option
It looks like your system doesn't support symbolic links, so will fallback to hard copy instead!

  [InvalidArgumentException]
  The "../ezpublish/../ezpublish_legacy/design/" directory does not exist.

ezpublish:legacy:assets_install [--symlink] [--relative] [target]

Script eZ\Bundle\EzPublishLegacyBundle\Composer\ScriptHandler::installAssets handling the post-install-cmd event terminated with an exception

  [RuntimeException]
  An error occurred when executing the ""ezpublish:legacy:assets_install --symlink --relative  web "" command.

create-project [-s|--stability="..."] [--prefer-source] [--prefer-dist] [--repository-url="..."] [--dev] [--no-dev] [--no-plugins] [--no-custom-installers] 
[--no-scripts] [--no-progress] [--keep-vcs] [--no-install] [package] [directory] [version]