While installing custom package(which is created using angular 7) into sample angular 7 application getting below error
C:samplesample-app-for-integration>npm i --save-dev C:projectestest-project-0.0.0.tgz
[..................] / rollbackFailedOptional: verb npm-session 65ac9cad9de7e4ac
npm WARN deprecated popper.js@1.16.1: You can find the new Popper v2 at @popperjs/core, this package is dedicated to the legacy v1
npm WARN deprecated document-register-element@1.8.1: V0 is gone and the best V1 polyfill is now @ungap/custom-elements
npm WARN deprecated @angular/http@5.2.11: Package no longer supported. Use @angular/common instead, see https://angular.io/guide/deprecations#angularhttp
npm WARN deprecated @types/moment-timezone@0.5.30: This is a stub types definition. moment-timezone provides its own type definitions, so you do not need this installed.
npm WARN @pscoped/ngx-pub-sub@3.0.2 requires a peer of @angular/common@^8.2.11 but none is installed. You must install peer dependencies yourself.
npm WARN @pscoped/ngx-pub-sub@3.0.2 requires a peer of @angular/core@^8.2.11 but none is installed. You must install peer dependencies yourself.
npm WARN ajv-keywords@3.5.2 requires a peer of ajv@^6.9.1 but none is installed. You must install peer dependencies yourself.
npm WARN @ng-bootstrap/ng-bootstrap@3.3.1 requires a peer of @angular/common@^6.1.0 but none is installed. You must install peer dependencies yourself.
npm WARN @ng-bootstrap/ng-bootstrap@3.3.1 requires a peer of @angular/core@^6.1.0 but none is installed. You must install peer dependencies yourself.
npm WARN @ng-bootstrap/ng-bootstrap@3.3.1 requires a peer of @angular/forms@^6.1.0 but none is installed. You must install peer dependencies yourself.
npm WARN @angular/core@9.1.13 requires a peer of zone.js@~0.10.3 but none is installed. You must install peer dependencies yourself.
npm WARN @angular/platform-browser@9.1.13 requires a peer of @angular/animations@9.1.13 but none is installed. You must install peer dependencies yourself.
npm WARN angular2-moment@1.9.0 requires a peer of @angular/core@>=2.0.0 <6.0.0 but none is installed. You must install peer dependencies yourself.
npm ERR! Cannot read property 'litmus' of undefined
npm ERR! A complete log of this run can be found in:
npm ERR! C:UsersGS-2059AppDataRoaming
pm-cache_logs2021-02-05T11_57_21_524Z-debug.log
package.json
{
"name": "sample-app-for-integration",
"version": "0.0.0",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/animations": "~7.0.0",
"@angular/common": "~7.0.0",
"@angular/compiler": "~7.0.0",
"@angular/core": "~7.0.0",
"@angular/forms": "~7.0.0",
"@angular/http": "~7.0.0",
"@angular/platform-browser": "~7.0.0",
"@angular/platform-browser-dynamic": "~7.0.0",
"@angular/router": "~7.0.0",
"@pscoped/ngx-pub-sub": "^3.0.2",
"core-js": "^2.5.4",
"rxjs": "~6.3.3",
"zone.js": "~0.8.26"
},
"devDependencies": {
"@angular-devkit/build-angular": "~0.10.0",
"@angular/cli": "~7.0.1",
"@angular/compiler-cli": "~7.0.0",
"@angular/language-service": "~7.0.0",
"@types/jasmine": "~2.8.8",
"@types/jasminewd2": "~2.0.3",
"@types/node": "~8.9.4",
"codelyzer": "~4.5.0",
"jasmine-core": "~2.99.1",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~3.0.0",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "~2.0.1",
"karma-jasmine": "~1.1.2",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.4.0",
"ts-node": "~7.0.0",
"tslint": "~5.11.0",
"typescript": "~3.1.1"
},
"description": "This project was generated with Angular CLI version 7.0.1.",
"main": "index.js",
"author": "",
"license": "ISC"
}
question from:
https://stackoverflow.com/questions/66063115/npm-err-cannot-read-property-litmus-of-undefined 
