Apache2 - The requested U...

This type of error is generated when you have not configure apache2.conf properly.Mainly this type of error was found in ubuntu. You just need to add phpmyadmin path in apache2.conf file,also when you visit inner pages of your website this type error found that requested url not found on this server.please follow below steps to resolved this  type of error.

Step 1: Open your terminal.

In this first step open your terminal OR simply press Ctrl + Alt + T and add below code to your terminal.

sudo -H gedit /etc/apache2/apache2.conf

Step 2:  Then add below line of code in your end of the file.

Include /etc/phpmyadmin/apache.conf

Step 3:  Also find below code in your file.

Options Indexes FollowSymLinks
AllowOverride None
Require all granted

In Above code replace  AllowOverride None to AllowOverride All

Step 4:  Open your terminal and add below code.

sudo a2enmod rewrite

Step 5:  Then restart apache.

sudo service apache2 restart