Failed Install on Windows multiple git errors

[kon1991]

Hello, I've tried installing shader-school, after defining the git PATH variable and I get these errors

npm WARN deprecated rework-inline@0.2.0: deprecated in favor of rework-import
npm WARN deprecated minimatch@2.0.10: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm ERR! git clone C:\Users\νικ\AppData\Roaming\npm-cache_git-remotes\git-https-github-com-ariya-esprima-git-harmony-8d046b84 C:\Users\C53F1\AppData\Local\Temp\npm-3824-02fe8de3\git-cache-a318abf6\a65a3eb93b9a5dce9a1184ca2d1bd0b184c6b8fd: Cloning into 'C:\Users\C53F1\AppData\Local\Temp\npm-3824-02fe8de3\git-cache-a318abf6\a65a3eb93b9a5dce9a1184ca2d1bd0b184c6b8fd'...
npm ERR! git clone C:\Users\νικ\AppData\Roaming\npm-cache_git-remotes\git-https-github-com-ariya-esprima-git-harmony-8d046b84 C:\Users\C53F1\AppData\Local\Temp\npm-3824-02fe8de3\git-cache-a318abf6\a65a3eb93b9a5dce9a1184ca2d1bd0b184c6b8fd: "git-upload-pack 'C:\Users\νικ\AppData\Roaming\npm-cache_git-remotes\git-https-github-com-ariya-esprima-git-harmony-8d046b84'": git-upload-pack 'C:\Users\νικ\AppData\Roaming\npm-cache_git-remotes\git-https-github-com-ariya-esprima-git-harmony-8d046b84': No such file or directory
npm ERR! git clone C:\Users\νικ\AppData\Roaming\npm-cache_git-remotes\git-https-github-com-ariya-esprima-git-harmony-8d046b84 C:\Users\C53F1\AppData\Local\Temp\npm-3824-02fe8de3\git-cache-a318abf6\a65a3eb93b9a5dce9a1184ca2d1bd0b184c6b8fd: fatal: Could not read from remote repository.
npm ERR! git clone C:\Users\νικ\AppData\Roaming\npm-cache_git-remotes\git-https-github-com-ariya-esprima-git-harmony-8d046b84 C:\Users\C53F1\AppData\Local\Temp\npm-3824-02fe8de3\git-cache-a318abf6\a65a3eb93b9a5dce9a1184ca2d1bd0b184c6b8fd:
npm ERR! git clone C:\Users\νικ\AppData\Roaming\npm-cache_git-remotes\git-https-github-com-ariya-esprima-git-harmony-8d046b84 C:\Users\C53F1\AppData\Local\Temp\npm-3824-02fe8de3\git-cache-a318abf6\a65a3eb93b9a5dce9a1184ca2d1bd0b184c6b8fd: Please make sure you have the correct access rights
npm ERR! git clone C:\Users\νικ\AppData\Roaming\npm-cache_git-remotes\git-https-github-com-ariya-esprima-git-harmony-8d046b84 C:\Users\C53F1\AppData\Local\Temp\npm-3824-02fe8de3\git-cache-a318abf6\a65a3eb93b9a5dce9a1184ca2d1bd0b184c6b8fd: and the repository exists.
npm ERR! git clone C:\Users\νικ\AppData\Roaming\npm-cache_git-remotes\git-https-github-com-ariya-esprima-git-harmony-8d046b84 C:\Users\C53F1\AppData\Local\Temp\npm-3824-02fe8de3\git-cache-a318abf6\a65a3eb93b9a5dce9a1184ca2d1bd0b184c6b8fd:
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules\shader-school\node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.0.17: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm ERR! Windows_NT 10.0.14393
npm ERR! argv "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js" "install" "-g" "shader-school"
npm ERR! node v6.9.4
npm ERR! npm v3.10.10
npm ERR! code 128

npm ERR! Command failed: git -c core.longpaths=true clone C:\Users\νικ\AppData\Roaming\npm-cache_git-remotes\git-https-github-com-ariya-esprima-git-harmony-8d046b84 C:\Users\C53F1\AppData\Local\Temp\npm-3824-02fe8de3\git-cache-a318abf6\a65a3eb93b9a5dce9a1184ca2d1bd0b184c6b8fd
npm ERR! Cloning into 'C:\Users\C53F1\AppData\Local\Temp\npm-3824-02fe8de3\git-cache-a318abf6\a65a3eb93b9a5dce9a1184ca2d1bd0b184c6b8fd'...
npm ERR! "git-upload-pack 'C:\Users\νικ\AppData\Roaming\npm-cache_git-remotes\git-https-github-com-ariya-esprima-git-harmony-8d046b84'": git-upload-pack 'C:\Users\νικ\AppData\Roaming\npm-cache_git-remotes\git-https-github-com-ariya-esprima-git-harmony-8d046b84': No such file or directory
npm ERR! fatal: Could not read from remote repository.
npm ERR!
npm ERR! Please make sure you have the correct access rights
npm ERR! and the repository exists.
npm ERR!
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR! https://github.com/npm/npm/issues

npm ERR! Please include the following file with any support request:
npm ERR! C:\Users\νικ\npm-debug.log

any idea what's the problem?