Erro ao executar "npm start" na pasta client

Olá professor, mesmo depois de refazer 3 vezes os passos do exercício, permaneço com o seguinte erro ao executar "npm start" na pasta client:

error Windows_NT 6.1.7601

error argv "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js" "start"

error node v6.10.3

error npm v3.10.10

error code ELIFECYCLE

error client@1.0.0 start: npm run tsc:w

error Exit status 1

error Failed at the client@1.0.0 start script 'npm run tsc:w'.

error Make sure you have the latest version of node.js and npm installed.

error If you do, this is most likely a problem with the client package,

error not with npm itself.

error Tell the author that this fails on your system:

error npm run tsc:w

error You can get information on how to open an issue for this project with:

error npm bugs client

error Or if that isn't available, you can get their info via:

error npm owner ls client

error There is likely additional logging output above.

verbose exit [ 1, true ]

Pode me ajudar por favor? Obrigada!