First argument expected to be valid callback

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘ssjp_Init’ was given in /home/content/02/4543502/html/dsm/smartcoffee/wp-includes/plugin.php on line 406

I get this error on dashboard, plugin page and when trying to save any pages when Slippery Content Slider is activated. It ceases when deactivated.

Tried deleting the plugin and reinstalling. I get the same result.
Using with the standard Twenty Thirteen Theme.

https://www.ads-software.com/plugins/slippy-slider-responsive-touch-navigation-slider/