W3C Validation Error: Duplicate attribute class.

Hi,

Great plugin, easy to install. I had no problems so far.

A little error showed up and is similar like one which has been resolved (http://ww.wp.xz.cn/support/topic/w3c-validation-error-duplicate-id-ssba).
I activated share buttons as widget in footer. Validation shows some duplicate class

…one” /><a class=”ssba_print” class=”ssba_share_link” href=”#” onclick=”win…

Here is my website http://astroriznica.com

Thanks in advance 🙂

Regards,
Bojan

https://ww.wp.xz.cn/plugins/simple-share-buttons-adder/