Php error while plugin activation

Hello,
we have purchased the plugin. When we try to activate the plugin, the following error is generated:

Fatal error: Uncaught ArgumentCountError: Too few arguments to function WP_Widget::__construct(), 0 passed in path\wp-includes\class-wp-widget-factory.php on line 62 and at least 2 expected in path\wp-includes\class-wp-widget.php:163 Stack trace: #0 path\wp-includes\class-wp-widget-factory.php(62): WP_Widget->__construct() #1 path\wp-includes\widgets.php(123): WP_Widget_Factory->register(‘Groups_Newslett…’) #2 path\wp-content\plugins\groups-newsletters\lib\views\class-groups-newsletters-widget.php(83): register_widget(‘Groups_Newslett…’) #3 path\wp-includes\class-wp-hook.php(324): Groups_Newsletters_Widget::widgets_init(”) #4 path\wp-includes\class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #5 path\wp-includes\plugin.php(517): WP_Hook->do_action(Array) #6 path\wp-includes\widgets.php(1870): do_action(‘widgets_init’) #7 path\wp-includes\class-wp-hook.php(324): wp_widgets_init(”) #8 path\wp-includes\class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #9 path\wp-includes\plugin.php(517): WP_Hook->do_action(Array) #10 path\wp-settings.php(700): do_action(‘init’) #11 path\wp-config.php(103): require_once(‘path’) #12 path\wp-load.php(50): require_once(‘path’) #13path\wp-blog-header.php(13): require_once(‘path’) #14 path\index.php(17): require(‘path’) #15 {main} thrown in path\wp-includes\class-wp-widget.php on line 163

It seems to be related to the registration of the widgets. We need help to solve the problem.

Thanks