Error

Hello, now I cannot enter my administration module and I cannot load the website either.

Fatal error: Uncaught Error: Call to undefined function armania_file_options() in /home/diprod/public_html/shop/wp-content/themes/armania/shortcode/ovic_blog/config/widget.php:26 Stack trace: #0 /home/diprod/public_html/shop/wp-includes/class-wp-widget-factory.php(61): Widget_Ovic_Blog->__construct() #1 /home/diprod/public_html/shop/wp-includes/widgets.php(115): WP_Widget_Factory->register('Widget_Ovic_Blo...') #2 /home/diprod/public_html/shop/wp-content/plugins/ovic-addon-toolkit/includes/classes/abstract-shortcode.php(198): register_widget('Widget_Ovic_Blo...') #3 /home/diprod/public_html/shop/wp-includes/class-wp-hook.php(287): Ovic_Addon_Shortcode->install_Widgets('') #4 /home/diprod/public_html/shop/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #5 /home/diprod/public_html/shop/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #6 /home/diprod/public_html/shop/wp-includes/widgets.php(1765): do_action('widgets_init') #7 /home/diprod/public_html/shop/wp-includes/class-wp-hook.php(287): wp_w in /home/diprod/public_html/shop/wp-content/themes/armania/shortcode/ovic_blog/config/widget.php on line 26