Access forbidden : New XAMPP security concept : XAMPP - phpmyadmin error

Solution :
Access forbidden :  New XAMPP security concept error in phpmyadmin after new XAMPP installation

1) Open the file /opt/lampp/etc/extra/httpd-xampp.conf

2) Search text #New XAMPP security concept in the file and replace Deny from all to Allow from all under #New XAMPP security concept

3) Add line Require all granted in <Directory "/opt/lampp/phpmyadmin">. 
 Now it looks like this.

<Directory "/opt/lampp/phpmyadmin">
    AllowOverride AuthConfig Limit
    Require all granted
    Order allow,deny
    Allow from all    
</Directory>

4) Restart XAMPP

If you are still getting problem

Solution : 2
Run following command

$ sudo /opt/lampp/lampp security

Set password for everything.
Restart XAMPP and try again.