Server error on visiting index

[g0blin]

Whenever I visit my website's index, kennymeyer.net, or my blog's index, blog.kennymeyer.net I get a server error altough when navigating to blog.kennymeyer.net/wp-admin for example, there is no problem at all.

There are indexes defined in each folder.

Please, help me fix this.

[descalzo]

Clear your browser cache and history. Both URLs work fine for me.