All in One SEO Pack and Simple Sitemap plugin error

I have downloaded it, installed it, modified my htaccess file and receive this error on the site:

Mac OS X 2°âATTR.„øâ˜&˜&com.apple.quarantine0000;4a8aab44;Safari;|com.apple.SafariThis resource fork intentionally left blank ÿÿMac OS X 2°âATTRî&èâ˜&˜&com.apple.quarantine0000;4a8aab44;Safari;|com.apple.SafariThis resource fork intentionally left blank ÿÿ

I am pretty good at tinkering, but wanted to see if anyone had an idea of where to start…