How do I fix a plugin error message?

The following error message keeps showing up on the Flip Productivity child site on my multisite Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'SlideShare_Admin' does not have a method 'options_init' in /home/glasswor/public_html/ on line 505

I know that it is associated with the SlideShare plugin, but it is not always there...I don't know anything about, I am not sure how to fix it.

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