ceemys

I am getting an error when I use my drop shadow plug in. I even tried downloading the plugin again. Can someone please advise if there is something else I need to do? I have restarted paint.net and I have rebooted my computer. The error The details

I've searched the forum and I hope I have not misssed another post. But I just started getting an error today when using the drop shadow effect. Please see the error I receive. No matter how many times I restart, I get the same error. I even reinstalled the plug in. Can someone please advise? Thanks!