How to transfer project folder to dropbox in XAMPP (macOS Catalina)?

Question

xampp

what do i do:

httpd.conf:

<IfModule unixd_module>
    User username
    Group daemon 
</IfModule>

httpd-vhosts.conf:

#Virtual hosts                  
Include etc/extra/httpd-vhosts.conf

httpd-vhosts.conf:

#localhost
<VirtualHost *:80>
    ServerName localhost
    DocumentRoot "/opt/lampp/htdocs"
    <Directory "/opt/lampp/htdocs">
        Options Indexes FollowSymLinks Includes execCGI
        AllowOverride All
        Allow From All
        Order Allow,Deny
    </Directory>
</VirtualHost>

#My custom host
<VirtualHost *:80>
    ServerName site.local
    DocumentRoot "/Users/username/Dropbox/sites"
    <Directory "/Users/username/Dropbox/sites">
        Options Indexes FollowSymLinks Includes ExecCGI
        AllowOverride All
        Require all granted
    </Directory>
    ErrorLog "logs/site.local-error_log"
</VirtualHost>

etc/hosts

#XAMPP    VirtualHost
127.0.0.1        site.local

=> localhost / site.local = Safari can't open the page “‎localhost / site.local” because Safari can't connect to the server “localhost / site.local”.

everything seems to be done according to the manual - everything seems to have worked on the previous makosi.