Hi Torben, i think my 500 internal is only by the browser, i took an look into the error log an found that: PHP Fatal error: Class 't3lib_htmlmail' not found in /var/www/typo3_src-4.7.8/t3lib/class.t3lib_div.php on line 4855, referer: https://www.bodenseekur.de/index.php?id=112