Re-installing C5 Blog

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I apologize up front if this is a stupid question - I just can't find other references to it in the Forums.

Previously I moved a blog page to the trash. I decided I wanted it back so I moved it under Home. When I opened that page I got a "fatal error." There are many references to that error.

I decided to let my previous blog go and moved it to the trash again. At that point I created a new sub-page with the Blog template, but now that, too, has the "Fatal error" on it.

I'd rather use the C5 Blog rather than pay for an add-on or use a third party like Blogger or WordPress. Any idea how I can get the Blog template to work again??