Error in the PHP File

I'm getting the error Trying to access array offset on value of type null


in powerkit_social_links_appearance called at /var/www/html/blog/wp-content/plugins/powerkit/modules/social-links/helpers/helper-powerkit-links.php (435)
in powerkit_social_links called at /var/www/html/blog/wp-content/themes/authentic/inc/template-tags.php (376)
in csco_get_header_content called at /var/www/html/blog/wp-content/themes/authentic/template-parts/header/header-layout.php (77)
in require called at /var/www/html/blog/wp-includes/template.php (812)
in load_template called at /var/www/html/blog/wp-includes/template.php (745)
in locate_template called at /var/www/html/blog/wp-includes/general-template.php (206)
in get_template_part called at /var/www/html/blog/wp-content/themes/authentic/inc/partials.php (60)
in csco_header_layout called at /var/www/html/blog/wp-includes/class-wp-hook.php (324)
in WP_Hook::apply_filters called at /var/www/html/blog/wp-includes/class-wp-hook.php (348)
in WP_Hook::do_action called at /var/www/html/blog/wp-includes/plugin.php (517)
in do_action called at /var/www/html/blog/wp-content/themes/authentic/header.php (42)
in require_once called at /var/www/html/blog/wp-includes/template.php (810)
in load_template called at /var/www/html/blog/wp-includes/template.php (745)
in locate_template called at /var/www/html/blog/wp-includes/general-template.php (48)
in get_header called at /var/www/html/blog/wp-content/themes/authentic/single.php (8)
in include called at /var/www/html/blog/wp-includes/template-loader.php (106)
in require_once called at /var/www/html/blog/wp-blog-header.php (19)
in require called at /var/www/html/blog/index.php (17)

Plugin Version Version 2.6.8