Error: Cannot find module 'grpc'

[yeonchoii]

Hello im blockchain novice student...!

$ node install_chaincode.js
getAdminSignedCertPEM()
internal/modules/cjs/loader.js:584
throw err;
^

Error: Cannot find module 'grpc'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:582:15)
at Function.Module._load (internal/modules/cjs/loader.js:508:25)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:22:18)
at Object. (/home/park/marbles/node_modules/fabric-ca-client/lib/Remote.js:19:12)
at Module._compile (internal/modules/cjs/loader.js:701:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:712:10)
at Module.load (internal/modules/cjs/loader.js:600:32)
at tryModuleLoad (internal/modules/cjs/loader.js:539:12)
at Function.Module._load (internal/modules/cjs/loader.js:531:3)
How can i solve this problem..?
please help :(
thank you for my text~!

[dshuffma-ibm]

you need to install the dependencies: https://github.com/IBM-Blockchain/marbles/blob/master/docs/host_marbles_locally.md

npm install should pass with no errors