=== Deploying to '<project-id>'...
i deploying functions
i functions: ensuring necessary APIs are enabled...
i runtimeconfig: ensuring necessary APIs are enabled...
✔ runtimeconfig: all necessary APIs are enabled
✔ functions: all necessary APIs are enabled
i functions: preparing functions directory for uploading...
i functions: packaged functions (865 B) for uploading
✔ functions: functions folder uploaded successfully
i starting release process (may take several minutes)...
i functions: updating function helloWorld...
⚠ functions[helloWorld]: Deploy Error: Function load error: Code in file index.js can't be loaded.
Did you list all required modules in the package.json dependencies?
Detailed stack trace: Error: Cannot find module 'firebase-admin'
at Function.Module._resolveFilename (module.js:469:15)
at Function.Module._load (module.js:417:25)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (/user_code/node_modules/firebase-functions/lib/apps.js:25:18)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)