Issue with installing cordova plugins using ionic cordova add plugin

Description: Unable to install cordova plugins using ionic cordova add plugin. I get the errors for every plugin I try to install this way.

Steps to Reproduce: Install a plugin using ionic cordova add plugin. I have tried this thousands of times, tried upgrading to the latest cordova, but nothing help, unless I install the plugins using cordova add plugin

Output:

Error: Text data outside of root node.
Line: 178
Column: 1
Char: n
    at error (/Users/jacques/dev/mobile/node_modules/elementtree/node_modules/sax/lib/sax.js:666:10)
    at strictFail (/Users/jacques/dev/mobile/node_modules/elementtree/node_modules/sax/lib/sax.js:692:7)
    at Object.write (/Users/jacques/dev/mobile/node_modules/elementtree/node_modules/sax/lib/sax.js:1035:15)
    at XMLParser.feed (/Users/jacques/dev/mobile/node_modules/elementtree/lib/parsers/sax.js:48:15)
    at ElementTree.parse (/Users/jacques/dev/mobile/node_modules/elementtree/lib/elementtree.js:271:10)
    at Object.parse (/Users/jacques/dev/mobile/node_modules/elementtree/lib/elementtree.js:584:8)
    at Function.<anonymous> (/Users/jacques/dev/mobile/node_modules/@ionic/cli-utils/lib/cordova/config.js:35:28)
    at next (native)
    at fulfilled (/Users/jacques/dev/mobile/node_modules/tslib/tslib.js:100:62)

My ionic info:

cli packages: (/Users/jacques/dev/mobile/node_modules)

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

global packages:

    cordova (Cordova CLI) : 6.5.0 
    Gulp CLI              : CLI version 3.9.1 Local version 3.9.1

local packages:

    Cordova Platforms : none
    Ionic Framework   : ionic1 1.3.5

System:

    ios-deploy : 1.9.2 
    Node       : v6.11.0
    npm        : 2.15.12 
    OS         : macOS High Sierra
    Xcode      : Xcode 9.1 Build version 9B55 

[jacquesdev]

Check your config.xml file, usually the end of it - you will probably see a xml node starting with />.

You should just be able to delete the weird bit of code at the end and try again

[Sagar-rr]

Since Last Two Days I am trying to install cordova-plugin-firebase-dynamiclinks but i am getting folowing I have search on google for error but I am not getting any solution and I am not able to understand why this error is comming. Please help
I get this error:

D:\Apps\myapp>ionic cordova platform add android

cordova.cmd platform add android Using cordova-fetch for cordova-android@^8.0.0 Adding android project… Creating Cordova project for the Android platform: Path: platforms\android Package: com.myapp.application Name: MyApp Activity: MainActivity Android target: android-28 Subproject Path: CordovaLib Subproject Path: app Android project created with cordova-android@8.1.0 Installing “cordova-plugin-android-permissions” for android Installing “cordova-plugin-androidx” for android Installing “cordova-plugin-androidx-adapter” for android Installing “cordova-plugin-contacts” for android Installing “cordova-plugin-device” for android Installing “cordova-plugin-firebase-dynamiclinks” for android Plugin dependency “cordova-support-android-plugin@1.0.1” already fetched, using that version. Installing “cordova-support-android-plugin” for android Plugin dependency “cordova-support-google-services@1.3.2” already fetched, usin that version. Installing “cordova-support-google-services” for android Subproject Path: CordovaLib Subproject Path: app Failed to install ‘cordova-plugin-firebase-dynamiclinks’: Error: Invalid charac er in entity name Line: 0 Column: 283 Char: = at error (D:\Apps\myapp\node_modules\elementtree\node_modules\sax\lib
ax.js:666:10) at strictFail (D:\Apps\myapp\node_modules\elementtree\node_modules\sax lib\sax.js:692:7) at SAXParser.write (D:\Apps\myapp\node_modules\elementtree\node_module \sax\lib\sax.js:1491:13) at XMLParser.feed (D:\Apps\myapp\node_modules\elementtree\lib\parsers
ax.js:48:15) at ElementTree.parse (D:\Apps\myapp\node_modules\elementtree\lib\eleme ttree.js:271:10) at Object.exports.XML (D:\Apps\myapp\node_modules\elementtree\lib\elem nttree.js:606:13) at ConfigFile_graft_child [as graft_child] (D:\Apps\myapp\node_modules cordova-common\src\ConfigChanges\ConfigFile.js:107:40) at PlatformMunger_apply_file_munge [as apply_file_munge] (D:\Apps\myapp \node_modules\cordova-common\src\ConfigChanges\ConfigChanges.js:81:34) at munge_helper (D:\Apps\myapp\node_modules\cordova-common\src\ConfigC anges\ConfigChanges.js:252:14) Invalid character in entity name Line: 0 Column: 283 Char: = at PlatformMunger.add_plugin_changes (D:\Apps\myapp\node_modules\cordo a-common\src\ConfigChanges\ConfigChanges.js:159:12) [ERROR] An error occurred while running subprocess cordova.

    cordova.cmd platform add android exited with exit code 1.

    Re-running this command with the --verbose flag may provide more
    information.