Why the url request cannot be found in server?

I done creating my own API,and host it to Ubuntu 16.04.I created the phpmyadmin with Php One click install.

Done this 2 line of command in digital ocean console

 sudo a2enmod rewrite
 sudo service apache2 restart

I have my own .htaccess file which is like below

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ %{ENV:BASE}index.php [QSA,L]

And I transferred my file to /var/www/html this directory.

I edit the apache2.config as well like below as well

<Directory /var/www/>
	Options Indexes FollowSymLinks
	AllowOverride All
	Require all granted
</Directory>

But when I call my api in Postman it show me this result it state url not found.I request my address as http://MY_IP_ADDRESS/example/v1/register ,I am sure is correct URL.

Somebody please tell me what can I do to solve this problem.What am I missing out??