Widget Error on website

Widget not working on Wordpress site after installing a new theme BRIXEL on a staging site.

Please note I need the error code fixed now and will provide access.

Error: (I removed the domain name):

Fatal error: Uncaught ArgumentCountError: Too few arguments to function rt_megamenu_remove_title_wiget_if_empty(), 1 passed in
/wp-includes/class-wp-hook.php on line 307 and exactly 3 expected in
public_html/wp-content/plugins/radiantthemes-mega-menu/rt-megamenu.php:146 Stack trace: #0
/public_html/wp-includes/class-wp-hook.php(307): rt_megamenu_remove_title_wiget_if_empty('GET A QUOTE') #1 /public_html/wp-includes/plugin.php(191): WP_Hook->apply_filters('GET A QUOTE', Array) #2
/public_html/wp-content/plugins/contact-form-7-widget/contact-form-7-widget.php(20): apply_filters('widget_title', 'GET A QUOTE') #3 /public_html/wp-includes/class-wp-widget.php(393): WP_Widget_Custom_CF7->widget(Array, Ar in /plugins/radiantthemes-mega-menu/rt-megamenu.php on line 146
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