I am migrating a Dancer2 site from Apache 2.2 to Apache 2.4 (Apache2 under Ubuntu). It works under 2.2 on CentOS, but not on the Ubuntu with 2.4. I copied the whole Dancer2 directory to the new server. I do the output with template commands, if that matters.

I read the Apache2 error log and put perl debugs before and after the template command. There are no errors between the debugs.

Here is the meaningful part of the Apache conf file. I have verified that apache reads it.

    DocumentRoot /var/webapps/sandbox/public
 
    <FilesMatch "\.(?:cgi|shtml|phtml|php)$">
        SSLOptions +StdEnvVars
    </FilesMatch>
    <Directory "/var/webapps/sandbox/public">
        Options +Indexes +FollowSymLinks +MultiViews +ExecCGI
    AddHandler cgi-script .cgi
        AllowOverride None
        Require all granted
    SSLOptions +StdEnvVars
    </Directory>
    RewriteEngine On
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteRule ^(.*)$ /dispatch.cgi$1 [QSA,L]

    # ScriptAlias / /var/webapps/sandbox/public/dispatch.cgi/
    <Location />
        # Set up your Dancer2 application
        SetHandler cgi-script
        AddHandler application/x-httpd-perl .cgi
        PerlSetEnv Dancer2_APP /var/webapps/sandbox/bin/app.pl
        PerlSetEnv DANCER2_CONFDIR /var/webapps/sandbox 
        PerlSetEnv DANCER_CONFDIR /var/webapps/sandbox 
        PerlSetEnv DANCER2_ENV development 
    </Location>

I tried very simple routes with no output. I verified that Dancer invokes the correct routes.