title: Raspberry Pi phpmyadmin 500 Error
body: <p>Hello I have a problem with my Raspberry Pi - Apache2 - Phpmyadmin</p>
  
  <p>If I view my phpmyadmin-dashbord the Server return a 500 error.</p>
  
  <p>The Apache2 ErrorLog show this code.</p>
  
  <p><code>[Sat May 05 15:54:22.843993 2018] [:error] [pid 23131] [client 37.138.229.55:50419] PHP Fatal error:  Uncaught Error: Call to undefined function __() in /usr/share/phpmyadmin/libraries/core.lib.php:235\nStack trace:\n#0 /usr/share/phpmyadmin/libraries/core.lib.php(308): PMA_fatalError('The [a@./url.ph...')\n#1 /usr/share/phpmyadmin/libraries/common.inc.php(90): PMA_warnMissingExtension('mbstring', true)\n#2 /usr/share/phpmyadmin/index.php(12): require_once('/usr/share/phpm...')\n#3 {main}\n  thrown in /usr/share/phpmyadmin/libraries/core.lib.php on line 235</code></p>
  
  <p>PDO and Mysqli is running.
  Just the Dashbord is not avaible and return "500".</p>
  
  <p>Thanks you for help.</p>