Only the original thread that created a view hierarchy can touch its views.

Hi there! First of all, my english is not very well, so please be patient to read my question slowly.

Well, as you can see on the tittle, I got a problem about threads. I'm using a Listview and trying to binding the ItemSource from a viewmodel loaded with data (I'm trying to do something like a timeline using facebook or instagram as example). The case is... when I try to use "Binding" I got this Error Message:

"Unhandled Exception:
Android.Util.AndroidRuntimeException: Only the original thread that created a view hierarchy can touch its views."

Yeah, I know this question has been answered in another threads in the forum with the following code:
"Device.BeginInvokeOnMainThread(() => { NotifyPropertyChanged( nameof(PropertyName) ); });"

But that line is the one that makes de app get into a Break Mode. So... any idea?

Thanks for read.