Typescript Error Cannot find name 'FirebaseService'

Ionic Framework ionic-v3
1

I’ve tried to install a new Ionic plugin (cordova-plugin-device, which I already had) and now I can’t serve or build my App. This is the error I get when I try to serve it. I haven’t changed anything, tried to update Node/Ionic/NPM packages, but still nothing helps at all.

Typescript Error
Cannot find name 'FirebaseService'.
node_modules/@firebase/database/dist/esm/src/api/Database.d.ts

This is my Ionic Info:

cli packages:

@ionic/cli-utils  : 1.19.0
ionic (Ionic CLI) : 3.19.0

global packages:

cordova (Cordova CLI) : 7.1.0

local packages:

@ionic/app-scripts : 3.1.6
Cordova Platforms  : none
Ionic Framework    : ionic-angular 3.9.2

System:

ios-deploy : 1.9.2 
ios-sim    : 5.0.12 
Node       : v8.9.3
npm        : 5.5.1 
OS         : macOS High Sierra
Xcode      : Xcode 9.2 Build version 9C40b
2

+1

cli packages: (/usr/local/lib/node_modules)

    @ionic/cli-utils  : 1.19.0
    ionic (Ionic CLI) : 3.19.0

global packages:

    cordova (Cordova CLI) : 7.1.0

local packages:

    @ionic/app-scripts : 3.1.7
    Cordova Platforms  : android 6.3.0 ios 4.5.4
    Ionic Framework    : ionic-angular 3.9.2

System:

    ios-deploy : 1.9.2
    Node       : v9.4.0
    npm        : 5.6.0
    OS         : macOS Sierra
    Xcode      : Xcode 9.2 Build version 9C40b
3

Don’t use Node 9. It isn’t compatible with Node Sass yet. Use the Node LTS. But the error is probably because you installed Firebase 4.8.1, and AF needs 4.8.0.