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I am getting a message: overlib 4.10 or later is required for the CSS style plug in

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I am taking an online class at http://ilearn.mpc.edu and I keep getting this pop up saying overlib 4.10 or later is required for the CSS Style Plug in. I tried downloading the latest version, but afterward I still got the same message - even after restarting computer. What is this and why all of a sudden did it appear? So far only for this ilearn website.

I am taking an online class at http://ilearn.mpc.edu and I keep getting this pop up saying overlib 4.10 or later is required for the CSS Style Plug in. I tried downloading the latest version, but afterward I still got the same message - even after restarting computer. What is this and why all of a sudden did it appear? So far only for this ilearn website.

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