Smart Buttons integration, cannot login and pay with sandbox

[eugmai86]

Hi All,

I'm trying to integrate Smart Buttons checkout.

It appeared that this dos not work, and return "

throw new Error("Do not integrate with sandbox domain");

" exception.

<script src="https://www.sandbox.paypal.com/sdk/js?client-id=i_put_valid_sandbox_client_id_here&currency=EUR"></script>

When i remove "sandbox" word from URL, it works just fine.
Next, when i click on this button:

I get a popup dialog, that ask me to enter credentials. So, i have created few buyer accounts on developer.paypal.com area, and tried them all. After getting this screen for about 1 minute:

I always get this screen (no matter which account i use):

There are no any errors are shown. Please help 🙂