MySQL said: Documentation
Cannot connect: invalid settings.
Write instead of localhost 127.0.0.1
localhost
127.0.0.1
or
Open config.inc.php and find $cfg['Servers'][$i]['host'] = '127.0.0.1'; and change 127.0.0.1 to localhost. It should work, it worked by me.
config.inc.php
$cfg['Servers'][$i]['host'] = '127.0.0.1';