CODE EXAMPLE FOR JAVASCRIPT

browseranimationsmodule browsermodule has already been loaded

// Credit: https://stackoverflow.com/questions/39286667/browsermodule-has-already-been-loaded-error

I think you are using 'NoopAnimationsModule' or 'BrowserAnimationsModule',
Which already contain 'BrowserModule' and loading your module lazily.
SO the solution is Replace the BrowserModule with
'NoopAnimationsModule or 'BrowserAnimationsModule' in your 'app.module.ts'.