Front controller reached 100 router match iterations

#0 /var/www/vhosts/scala-lederpflege.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Front.php(165): Mage::throwException('Front controlle...')
#1 /var/www/vhosts/scala-lederpflege.de/httpdocs/app/Mage.php(459): Mage_Core_Controller_Varien_Front->dispatch()
#2 /var/www/vhosts/balsan.de/httpdocs/index.php(70): Mage::run('web_balsan', 'website')
#3 {main}