Problem with adding new post grid

I’ve just installed a Post Grid Combo on my website. I’m trying to add my first grid, but when I hit save I get the error with post_grid_recursive_sanitize_arr() function. I get the following error when I try to save:
“An E_ERROR type error occurred on line 586 of the file /<obfuscated>/wp-content/plugins/post-grid/includes/classes/class-meta-boxes.php. Error message: Uncaught Error: Call to undefined function post_grid_recursive_sanitize_arr() in /<obfuscated>/wp-content/plugins/post-grid/includes/classes/class-meta-boxes.php:586 Stack trace: #0 /<obfuscated>/wp-includes/class-wp-hook.php(310): post_grid_meta_boxs->post_grid_save(2922) #1 /<obfuscated>/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array) #2 /<obfuscated>/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #3 /<obfuscated>/wp-includes/post.php(4715): do_action(‘save_post’, 2922, Object(WP_Post), true) #4 /<obfuscated>/wp-includes/post.php(4817): wp_insert_post(Array, false, true) #5 /<obfuscated>/wp-admin/includes/post.php(439): wp_update_post(Array) #6 /<obfuscated>/wp-admin/post.php(227): edit_post() #7 {main} thrown”