How to increase the max_input_vars value from Site5

You can try increase default value of max_input_vars via htaccess for Site5 Web Hosting

php_value max_input_vars 2000

if you got 500 error, you should use following

<IfModule mod_php5.c>

 php_value max_input_vars 2000

</IfModule>

More methods can be checked by following link

How to Increase max_input_vars