target=„_self" doesn’t work

Hello , I’m using code [mmp-geochart mode=”region” target=„_self”] but it doesn’t work. What I should do to post opened in the same window?
Thank you very much for your work. I love this plugin 😀
http://fragmentator.pl/miejsca-o-ktorych-pisalam-na-blogu/

https://ww.wp.xz.cn/plugins/map-my-posts/