101TECH

change :

RewriteEngine On
RewriteCond %{REQUEST_METHOD} ^TRACE
RewriteRule .* – [F]

To this:

RewriteEngine On
RewriteCond %{REQUEST_METHOD} ^TRACE
RewriteRule .* – [F]
RewriteLog /var/log/apache2/rewrite.log
RewriteLogLevel 0

as described here