Captcha Box Black

Installed a few days ago Was working fine but now all of a sudden the Captcha Box is Black (with I assume black Text, so cannot see anything)
Nothing seems to have changed on my site as far as I know. Any Changes on the Captcha-Bank Side? http://www.mk34.com/wp-admin
Used on login Pop Up.(was working fine)

https://ww.wp.xz.cn/plugins/captcha-bank/