when i am using this package in angular 6 having below error
ERROR in ./node_modules/angular4-multiselect-dropdown/angular4-multiselect-dropdown.ts
Module build failed (from ./node_modules/@ngtools/webpack/src/index.js):
Error: /home/users/praviteja/git-repo/espn/espn-analytics-web/node_modules/angular4-multiselect-dropdown/angular4-multiselect-dropdown.ts is missing from the TypeScript compilation. Please make sure it is in your tsconfig via the 'files' or 'include' property.
The missing file seems to be part of a third party library. TS files in published libraries are often a sign of a badly packaged library. Please open an issue in the library repository to alert its author and ask them to package the library using the Angular Package Format (https://goo.gl/jB3GVv).
at AngularCompilerPlugin.getCompiledFile (/home/users/praviteja/git-repo/espn/espn-analytics-web/node_modules/@ngtools/webpack/src/angular_compiler_plugin.js:752:23)
at plugin.done.then (/home/users/praviteja/git-repo/espn/espn-analytics-web/node_modules/@ngtools/webpack/src/loader.js:41:31)
at
at process._tickCallback (internal/process/next_tick.js:189:7)
when i am using this package in angular 6 having below error