ngx-bootstrap Modal Component not found even after adding to entry component

Recently I have converted an ASP.NET Core 2.0 Angular app to ASP.NET Core 2.1 (later one uses angular/cli app). In the previous version I had some modal components built with ngx-bootstrap which were working correctly. But after conversion those components stopped working and started throwing this error -

No component factory found for {component}. Did you add it to @NgModule.entryComponents?

I have added following to my app.module.ts file -

@NgModule({
    imports: [
        ModalModule.forRoot(),
        MySubModule
    ],
    entryComponents: [
        MyModalComponent
    ]
})

In my MySubModule -

@NgModule({
    declarations: [
        MyModalComponent
    ],
    imports: [
        ModalModule.forRoot()
    ]
    exports: [
        MyModalComponent
    ]
})

Even though I have defined my entry component it's throwing this error. Can anyone suggest any solution?

It was actually a silly problem. I was only looking at my code but the problem was caused by some files that were in ClientApp/dist directory. So the application was pulling those files instead of picking up the ng serve files. So, any changes I was making to my files were not getting picked up. Deleting everything from dist folder fixed the issue.