Pagination not working. Gets fatal error

Hello, I’m getting this error in pagination of a child theme.

Could you advice where is the problem?

Fatal error: Uncaught Error: Call to undefined function avia_get_current_pagination_number()
in /wp-content/themes/enfold/config-templatebuilder/avia-shortcodes/postslider/postslider.php on line 1012

Call stack:

avia_post_slider::query_entries()
wp-content/themes/enfold/config-templatebuilder/avia-shortcodes/blog/blog.php:581
avia_sc_blog::shortcode_handler()
wp-content/themes/enfold/config-templatebuilder/avia-template-builder/php/shortcode-template.class.php:1042
aviaShortcodeTemplate::shortcode_handler_prepare()
wp-includes/shortcodes.php:343
do_shortcode_tag()
preg_replace_callback()
wp-includes/shortcodes.php:218
do_shortcode()
wp-content/themes/enfold/config-templatebuilder/avia-template-builder/php/shortcode-helper.class.php:484
ShortcodeHelper::avia_remove_autop()
wp-content/themes/enfold/config-templatebuilder/avia-shortcodes/section.php:1099
avia_sc_section::shortcode_handler()
wp-content/themes/enfold/config-templatebuilder/avia-template-builder/php/shortcode-template.class.php:1042
aviaShortcodeTemplate::shortcode_handler_prepare()
wp-includes/shortcodes.php:343
do_shortcode_tag()
preg_replace_callback()
wp-includes/shortcodes.php:218
do_shortcode()
wp-includes/class-wp-hook.php:287
WP_Hook::apply_filters()
wp-includes/plugin.php:206
apply_filters()
wp-content/themes/enfold/template-builder.php:100
include()
wp-includes/template-loader.php:106
require_once()
wp-blog-header.php:19
require()
index.php:17