PHP problem with new version of GP Premium

Hi everyone,

I installed the latest version of GP Premium and since then every time I try to edit a page I get the message below:

( ! ) Fatal error: Call to undefined function wp_add_inline_script() in /home/aguiarqualidade.com.br/www/wp-content/plugins/gp-premium/sections/functions/metaboxes/metabox-functions.php on line 159
Call Stack
# Time Memory Function Location
1 0.0146 234320 {main}( ) .../post.php:0
2 4.2600 8513328 include( '/home/aguiarqualidade.com.br/www/wp-admin/edit-form-advanced.php' ) .../post.php:173
3 4.4240 8675848 require_once( '/home/aguiarqualidade.com.br/www/wp-admin/admin-header.php' ) .../edit-form-advanced.php:472
4 4.4344 8688448 do_action( ) .../admin-header.php:92
5 4.4446 8702344 call_user_func_array:{/home/aguiarqualidade.com.br/www/wp-includes/plugin.php:525} ( ) .../plugin.php:525
6 4.4446 8702496 generate_sections_metabox_scripts( ) .../plugin.php:525

What should I do?

Many thanks.