Fabiani,
Sorry that you are seeing this issue.
Is any firewall or anti virus software like McAfee running in the machine? It could block the download of node_modules folder. Disable Anti Virus for sometime, select a different version of Node.js/NPM or delete the corresponding folder from the .codemix-store and open a new tab in the Terminal+ view for the project. This should download the version of Node.js and NPM again.
Also recheck if the Node.js and NPM versions of the project are compatible with each other. If you are still seeing issues, then please share the angular-cli, node.js and npm versions of the project to help us investigate further.
–Swapna
Genuitec Support