ajax http 500 error while editing panel in drupal 7
Please check below configuration &amp; update :

php.ini


  max_execution_time = 30 --> 60 ;
  
  memory_limit = 32 --> 128, or even 256M ;


.htaccess

Add the below lines :


  php_value auto_append_file none
  
  php_value memory_limit 128M


my.ini


  max_allowed_packet = 4M --> 64M