basic interface icons not working or docs is not clear

Describe the bug I try to use some icons from the chackra-ui, with chakra-ui/core 1.0.0-rc.2, but I get the following error message:

Error
Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.

Check the render method of `App`.

Link to minimal reproduction Here is a JavaScript CodeSandbox about it: https://codesandbox.io/s/sharp-chandrasekhar-bzbji?file=/src/index.js

Steps to Reproduce

Import an icon (e.g.: PhoneIcon) from "@chakra-ui/core", and add it inside <ChakraProvider>

[jmiazga]

Its a named export, not the default export. You need { PhoneIcon }

[jmiazga]

I agree. I am going to leave this ticket open, and update the docs to clarify all of this.