NOT valid digest

I GET SUCH ERROR IN INSPECT ELEMENT
Failed to find a valid digest in the ‘integrity’ attribute for resource ‘https://fonts.googleapis.com/css?family=Roboto%3A300%2C400%2C400italic%2C500%2C700%2C700italic&ver=4.9.4’ with computed SHA-256 integrity ‘CZInxx2oSIUpOsI1Q3pOtYyMlzN19L34lNxdbUMkB48=’. The resource has been blocked.