Flutter – Could not find the correct Provider

You get this error because your SecretProvider instance is part of HomeScreen which is not a parent of SecretScreen.

In order, when you push a new page, this new page is not a descendent of the previous one so you can’t access to inherited object with the .of(context) method.

Here the a schema representing the widget tree to explain the situation :

1. With a Provider on top of MaterialApp (the navigator) :

   Provider
     MaterialApp
       HomeScreen -> push SecretScreen
       SecretScreen -> Here we can acces the Provider by calling Provider.of(context) because the context can access to its ancestors 
   

2. With a Provider created in HomeScreen :

   MaterialApp
     HomeScreen -> push SecretScreen
       Provider -> The provider is part of HomeScreen
     SecretScreen -> The context can't access to the Provider because it's not part of its ancestors
   

I hope my answer is pretty clear and will help you to understand what happens 😉