Error when adding PHP code to single.php

Hello,

I installed the plugin and chose the manual setting. I then added <?php mashsharer(); ?> in my single.php file where I wanted the sharing icons to appear, but I get the error below. Any suggestions?

Warning: Missing argument 2 for mashsharer::mashsharerShow(), called in /home/directory/site/wp-content/plugins/mashsharer/mashsharer.php on line 214 and defined in /home/directory/site/wp-content/plugins/mashsharer/class.mashsharer.php on line 89

Thanks!

https://ww.wp.xz.cn/plugins/mashsharer/