phpmyadmin中的MySQL错误,当点击列进行更改时

I got this below error when clicked on column(s) to change. What is the reason for this error ? I know that by doing this : $cfg['SendErrorReports'] = 'never'; in config.inc.php will solve this issue but it just stops popping up the error message...

Notice in .\libraries\tbl_columns_definition_form.inc.php#55 Undefined variable: server

Backtrace .\libraries\structure.lib.php#2452: include(.\libraries\tbl_columns_definition_form.inc.php) .\tbl_structure.php#45: PMA_displayHtmlForColumnChange( string 'lr', string 'users', NULL, string 'tbl_str