Issues with Header

I installed this to add some forums to my WP blog. Unfortunately when you activate it and it adds the link in my header. It messes up all of the links. Instead of being white they change to a blue hyperlink for some reason. Not sure what code you’d need to see to fix this, but the site is Jelusich.net.

https://www.ads-software.com/extend/plugins/wp-bulletin-board/