Problem with CORS in Angular 7 application and Webapi

Question

Hey, guys, good morning. I am creating my first Angular 7 application with . NET Core Webapi.

After all the structure of the mounted front, I went to communicate a get in an api I created and managed using an extension for Chrome that enables CORS, according to the method below.

getAgenda() {
    return this.http.get(apiUrl)
      .subscribe(d=> console.log(d));
  }

** This my apiUrl variable is my webapi running on localhost.

With the above method, I was able to obtain values.

However, when I call another method referring to another Component, using the POST, I have error. Note the screen below:

In-service method:

AddTipoPerfil(tipoperfil) {
    this.http.post(apiUrl, tipoperfil)
      .subscribe(res => console.log(res));
  }

Method of my Communication:

addTipoPerfil(ret){
    const obj = {
      Nome: ret.value.Nome,
      id: 0
    }

    this.apiService.AddTipoPerfil(obj);
  }

** Where Ret is my formgroup.

Entity in my backend:

[Table("TipoPerfil")]
    public class TipoPerfil : Implementation.EntityBase
    {
        [Column("Nome")]
        public string Nome { get; set; }
    }

I get this mistake:

Who can help, thank you <3 !