An unhandled error occured

Call to a member function appendChild() on null

Stack trace
#0 /home/allrou1q/stopdekolonistenvankatoen/base/SMLog.class.php(102): SMDataSource->Insert(Object(SMKeyValueCollection))
#1 /home/allrou1q/stopdekolonistenvankatoen/base/SMLog.class.php(14): SMLog::Log('/home/allrou1q/...', 525, 'Error 8192: Fun...')
#2 /home/allrou1q/stopdekolonistenvankatoen/base/SMController.class.php(525): SMErrorHandler(8192, 'Function get_ma...', '/home/allrou1q/...', 525, Array)
#3 /home/allrou1q/stopdekolonistenvankatoen/base/SMController.class.php(80): SMController->disableMagicQuotes()
#4 /home/allrou1q/stopdekolonistenvankatoen/index.php(26): SMController->__construct()
#5 {main}