Did you manage to install new exercise framework (perseus). I am getting an error while make
npm ERR! Error: No compatible version found: rcss@'khan/RCSS#9e5ec9614e391d28a621297a63bc2d850eae89e8'
npm ERR! Valid install targets:
npm ERR! ["0.0.0","0.1.0","0.1.1","0.1.2","0.1.3"]
npm ERR! at installTargetsError (/usr/share/npm/lib/cache.js:488:10)
npm ERR! at /usr/share/npm/lib/cache.js:375:15
npm ERR! at saved (/usr/share/npm/lib/utils/npm-registry-client/get.js:147:7)
npm ERR! at Object.oncomplete (/usr/lib/nodejs/graceful-fs.js:230:7)
npm ERR! You may report this log at:
npm ERR! or use
npm ERR! reportbug --attach /home/bitnami/perseus-master/npm-debug.log npm
npm ERR!