Firebase Deploy error - There was an unknown problem while trying to parse function triggers. Please ensure you are using Node.js v6 or greater

I'm getting There was an unknown problem while trying to parse function triggers. Please ensure you are using Node.js v6 or greater

when trying to do firebase deploy --only functions

I tried with node -v v10.10.0 node -v v8.11.1 node -v v10.15.3

Background: this is a project that I develop 6 month ago, it worked with no issue, but today I tried to re-deploy (no changes in the code) and I get this error.

I have no idea how to work from here, would appreciate any idea.

here is the full log:

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

firebase deploy --only functions
=== Deploying to 'invoice-manager-251609'...
i  deploying functions
Running command: npm --prefix "$RESOURCE_DIR" run lint
> functions@ lint D:\work\ocr\receiptWeb\functions
> eslint .
D:\work\ocr\receiptWeb\functions\index.js
127:25  warning  Avoid nesting promises              promise/no-nesting
127:25  warning  Avoid nesting promises              promise/no-nesting
128:35  warning  Don't make functions within a loop  no-loop-func
132:40  warning  Avoid nesting promises              promise/no-nesting
132:40  warning  Avoid nesting promises              promise/no-nesting
134:44  warning  Avoid nesting promises              promise/no-nesting
146:38  warning  Don't make functions within a loop  no-loop-func
424:28  warning  Avoid nesting promises              promise/no-nesting
424:28  warning  Avoid nesting promises              promise/no-nesting
465:28  warning  Avoid nesting promises              promise/no-nesting
465:28  warning  Avoid nesting promises              promise/no-nesting
D:\work\ocr\receiptWeb\functions\ReceiptGv.js
368:43  warning  Don't make functions within a loop  no-loop-func
✖ 12 problems (0 errors, 12 warnings)
+  functions: Finished running predeploy script.
i  functions: ensuring necessary APIs are enabled...
+  functions: all necessary APIs are enabled
i  functions: preparing functions directory for uploading...
Error: There was an unknown problem while trying to parse function triggers. Please ensure you are using Node.js v6 or greater.

<!-- end snippet -->

NOTE: the warnings are not new, and I could deploy the project with them in the past.

sometimes it gives this addiation line Having trouble? Try again or contact support with contents of firebase-debug.log

but I couldn't find any info about firebase-debug.log in google.

Installing a different node verion didn't work for me, but removing the node-modules folder from functions and then re-installing dependencies did.

Solve by installing node v8.17.0

Please check your Node version by typing ( node -v ) in your console or Terminal and also check your Package.json which is inside functions and check the below code.

  "engines": {
"node": "14"
},

The above means I want to deploy firebase. In this case, I should already install node 14 or 14 + version on my pc.

There was a bug in firebase-tools (I can't remember what version now) which was fixed. Just make sure you have the latest running:

npm install -g firebase-tools@latest

There is no need to update Node versions or dependencies
we often run the command:

firebase deploy --only functions

use these simple steps:

1: Go to the package.json file

in the script object add the following:

"deploy": "firebase deploy --only \"functions:<your function name>\"",

it will look like this:

  "scripts": {
"lint": "eslint .",
"serve": "firebase serve",
"shell": "firebase functions:shell",
"start": "npm run shell",
"deploy": "firebase deploy --only \"functions:app\"",
"logs": "firebase functions:log"
},

2: then run this deploy script from package.json file.

it will work!.

Check if you are running the app in the same port that is going to be deployed.
In my case a just had to stop running the script locally and it worked with no problem