I don't know about the first error, but the second error means:

"This means you're loading the package twice. Try and find the other
place you're loading it and delete that line. Note that it may be another package that's implicitly loading inputenc."

I got that by googling around for those two latex error lines... You'll probably have more luck in the more techie forums, though (and I see you've already posted to at least one of 'em, so good luck!).