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Тема: Ошибка при экспорте бд локальконого сервера

При экспорте в новом окне появляется ошибка:

Warning: Unknown: Input variables exceeded 1000. To increase the limit change max_input_vars in php.ini. in Unknown on line 0
phpMyAdmin - Error
Error during session start; please check your PHP and/or webserver log file and configure your PHP installation properly. Also ensure that cookies are enabled in your browser.

session_start(): Cannot send session cookie - headers already sent

session_start(): Cannot send session cache limiter - headers already sent

Cannot modify header information - headers already sent

А в окне экспорта phpmyadmin:

Warning in .\libraries\error.inc.php#16
Cannot modify header information - headers already sent

Backtrace

.\libraries\error.inc.php#16: header(string 'Content-Type: text/html; charset=utf-8')
.\libraries\core.lib.php#252: include(.\libraries\error.inc.php)
.\libraries\session.inc.php#116: PMA_fatalError(string 'Error during session start; please check your PHP and/or webserver log file and configure your PHP installation properly. Also ensure that cookies are enabled in your browser.<br /><br />session_start(): Cannot send session cookie - headers already sent<br /><br />session_start(): Cannot send session cache limiter - headers already sent<br /><br />Cannot modify header information - headers already sent')
.\libraries\session.inc.php#141: PMA_sessionFailed(array)
.\libraries\common.inc.php#259: require(.\libraries\session.inc.php)
.\export.php#24: include_once(.\libraries\common.inc.php)

Подскажите как исправить ошибку.