Allowing an extension and not a website

[Baal]

I've been unable to find how to allow extensions, in this case the extension in Chrome that is added by Lastpass.
The extension appears in the address bar as 'chrome-extension://'. When I open the password vault there is a section on the side that says 'Requests to the server have been blocked by an extension'. I've ruled out all the others so I think it can only be NoScript.

Am I correct that this can happen, and if so how can I allow it?

[barbaz]

How did you get NoScript to install in Chrome?