If you have installed Fontawesome Pro, check ~/.npmrc.
@fortawesome:registry=https://npm.fontawesome.com/
//npm.fontawesome.com/:_authToken=XXXGoto your firebase project directory, and copy the content of ~/.npmrc to functions/.npmrc.
cd functionscat ~/.npmrc > .npmrcRun deployment.
firebase deployor
firebase deploy --only functions:FUNCTION_NAMEReferences: