TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined

firebase-tools:

7.11.0

Platform:

Linux

[REQUIRED] Steps to reproduce

1. run firebase serve --debug
2. Title error will occur.

[REQUIRED] Expected behavior

Emulators start on default ports.

[REQUIRED] Actual behavior

owner@G700:~/PhpstormProjects/shopify/buyUsedServer$ firebase serve --debug
[2020-01-10T21:56:29.047Z] ----------------------------------------------------------------------
[2020-01-10T21:56:29.060Z] Command:       /home/owner/.nvm/versions/node/v10.16.3/bin/node /usr/local/bin/firebase serve --debug
[2020-01-10T21:56:29.061Z] CLI Version:   7.11.0
[2020-01-10T21:56:29.061Z] Platform:      linux
[2020-01-10T21:56:29.061Z] Node Version:  v10.16.3
[2020-01-10T21:56:29.062Z] Time:          Sat Jan 11 2020 04:56:29 GMT+0700 (Indochina Time)
[2020-01-10T21:56:29.064Z] ----------------------------------------------------------------------
[2020-01-10T21:56:29.064Z] 
[2020-01-10T21:56:29.083Z] > command requires scopes: ["email","openid","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","https://www.googleapis.com/auth/cloud-platform"]
[2020-01-10T21:56:29.083Z] > authorizing via signed-in user
[2020-01-10T21:56:29.084Z] [iam] checking project buyusedshopify for permissions ["firebase.projects.get"]
[2020-01-10T21:56:29.087Z] >>> HTTP REQUEST POST https://cloudresourcemanager.googleapis.com/v1/projects/buyusedshopify:testIamPermissions  
 permissions=[firebase.projects.get]
[2020-01-10T21:56:30.516Z] <<< HTTP RESPONSE 200 content-type=application/json; charset=UTF-8, vary=X-Origin, Referer, Origin,Accept-Encoding, date=Fri, 10 Jan 2020 21:56:30 GMT, server=ESF, cache-control=private, x-xss-protection=0, x-frame-options=SAMEORIGIN, x-content-type-options=nosniff, server-timing=gfet4t7; dur=1191, alt-svc=quic=":443"; ma=2592000; v="46,43",h3-Q050=":443"; ma=2592000,h3-Q049=":443"; ma=2592000,h3-Q048=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000, accept-ranges=none, transfer-encoding=chunked
[2020-01-10T21:56:30.519Z] >>> HTTP REQUEST GET https://firebase.googleapis.com/v1beta1/projects/buyusedshopify  
 
[2020-01-10T21:56:31.188Z] <<< HTTP RESPONSE 200 content-type=application/json; charset=UTF-8, vary=X-Origin, Referer, Origin,Accept-Encoding, date=Fri, 10 Jan 2020 21:56:31 GMT, server=ESF, cache-control=private, x-xss-protection=0, x-frame-options=SAMEORIGIN, x-content-type-options=nosniff, alt-svc=quic=":443"; ma=2592000; v="46,43",h3-Q050=":443"; ma=2592000,h3-Q049=":443"; ma=2592000,h3-Q048=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000, accept-ranges=none, transfer-encoding=chunked

=== Serving from '/home/owner/PhpstormProjects/shopify/buyUsedServer'...

[2020-01-10T21:56:31.194Z] >>> HTTP REQUEST GET https://firebase.googleapis.com/v1beta1/projects/buyusedshopify/webApps/-/config  
 
[2020-01-10T21:56:31.197Z] TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined
    at validateString (internal/validators.js:125:11)
    at Object.join (path.js:1147:7)
    at Object.<anonymous> (/usr/local/lib/node_modules/firebase-tools/lib/serve/functions.js:20:39)
    at Generator.next (<anonymous>)
    at /usr/local/lib/node_modules/firebase-tools/lib/serve/functions.js:7:71
    at new Promise (<anonymous>)
    at __awaiter (/usr/local/lib/node_modules/firebase-tools/lib/serve/functions.js:3:12)
    at Object.start (/usr/local/lib/node_modules/firebase-tools/lib/serve/functions.js:18:16)
    at /usr/local/lib/node_modules/firebase-tools/lib/serve/index.js:15:23
    at arrayMap (/usr/local/lib/node_modules/firebase-tools/node_modules/lodash/lodash.js:639:23)
    at Function.map (/usr/local/lib/node_modules/firebase-tools/node_modules/lodash/lodash.js:9554:14)
    at _serve (/usr/local/lib/node_modules/firebase-tools/lib/serve/index.js:13:26)
    at Command.module.exports.Command.description.option.option.option.option.before.action [as actionFn] (/usr/local/lib/node_modules/firebase-tools/lib/commands/serve.js:58:12)
    at Command.<anonymous> (/usr/local/lib/node_modules/firebase-tools/lib/command.js:156:25)
    at Generator.next (<anonymous>)
    at fulfilled (/usr/local/lib/node_modules/firebase-tools/lib/command.js:4:58)

Error: An unexpected error has occurred.

Note

I had to explicitly uninstall my global firebase install prior to it updating from 4.0.2 (in previous bug report) to 7.11.0. But as you can see it is on the new version now.

[bkendall]

In your firebase.json file, do you have a value set for functions, or functions.source? If you do, that may be causing this issue. (The docs regarding that setting)

[albertvp]

Same issue of validateString with the same TypeError but doing any deploy firebase deploy --only hosting. Even logging out and in, creating a new project and reinitializing the whole firebase config files. Using Firestore & Hosting only. firebase@7.14.1 node@14 Worked downgrading to firebase-tools@8.0.3