Cannot install ravencore-node #2

If i install with command "npm install -g ravencore-node", i get the following error:

/

ravencore-node@1.0.3 preinstall /home/user/.nvm/versions/node/v4.9.1/lib/node_modules/ravencore-node
./scripts/download

sh: 1: ./scripts/download: Permission denied
npm ERR! Linux 4.15.0-45-generic
npm ERR! argv "/home/user/.nvm/versions/node/v4.9.1/bin/node" "/home/user/.nvm/versions/node/v4.9.1/bin/npm" "install" "-g" "ravencore-node"
npm ERR! node v4.9.1
npm ERR! npm v2.15.11
npm ERR! code ELIFECYCLE

npm ERR! ravencore-node@1.0.3 preinstall: ./scripts/download
npm ERR! Exit status 126
npm ERR!
npm ERR! Failed at the ravencore-node@1.0.3 preinstall script './scripts/download'.
npm ERR! This is most likely a problem with the ravencore-node package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! ./scripts/download
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs ravencore-node
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!
npm ERR! npm owner ls ravencore-node
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! /home/user/npm-debug.log

Anyone help me please.