Why is PHPNyAdmin not working?

Question

PHP

Hello! For some reason, PHPMyAdmin does not work - error 500. In the Apache error logs:

[Tue Jan 17 17:12:30.231541 2017] [:error] [pid 18129] [client 176.213.12.245:42694] 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 [[email protected]/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
[Tue Jan 17 17:12:33.007324 2017] [:error] [pid 18127] [client 176.213.12.245:42696] 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 [[email protected]/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
[Tue Jan 17 17:12:33.676080 2017] [:error] [pid 18128] [client 176.213.12.245:42698] 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 [[email protected]/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
[Tue Jan 17 17:12:35.412616 2017] [:error] [pid 18136] [client 176.213.12.245:42706] 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 [[email protected]/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
[Tue Jan 17 17:18:40.255327 2017] [:error] [pid 18133] [client 176.213.12.245:42820] 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 [[email protected]/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
[Tue Jan 17 17:20:40.633431 2017] [:error] [pid 18129] [client 176.213.12.245:42924] 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 [[email protected]/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

Line 235:
$error_header = __('Error');

Answer 1

MissingExtension('mbstring'

Answer 2

install the mbstring extension for php, and also enable it in the apache settings via a2enmod, if memory serves)