Invalid URL's from Google Webmaster using v4.0 BETA

Hi,

My site uses the Transposh translation tool and I have a lot of invalid URL’s being generated by Google webmaster tools.

The URL’s are all valid e.g.:

http://www.candy-crush.co/ar/sitemap-externals.xml

Errors

Invalid URL

This is not a valid URL. Please correct it and resubmit.

854

Sitemap: http://www.candy-crush.co/sitemap-externals.xml
URL: /af/
Parent tag: url
Tag: loc

Dec 24, 2013
Sitemap: http://www.candy-crush.co/sitemap-externals.xml
URL: /ar/
Parent tag: url
Tag: loc

Please help, Thanks

http://ww.wp.xz.cn/plugins/google-sitemap-generator/