Warning: Undefined array key "groups" in /home/assolenjeux/public_html/wp-content/plugins/my-calendar/my-calendar-output.php on line 1946

Fatal error: Uncaught TypeError: array_merge(): Argument #2 must be of type array, null given in /home/assolenjeux/public_html/wp-content/plugins/my-calendar/my-calendar-output.php:1946 Stack trace: #0 /home/assolenjeux/public_html/wp-content/plugins/my-calendar/my-calendar-output.php(1946): array_merge(Array, NULL) #1 /home/assolenjeux/public_html/wp-content/plugins/my-calendar/my-calendar-print.php(119): my_calendar(Array) #2 /home/assolenjeux/public_html/wp-content/plugins/my-calendar/my-calendar-print.php(22): my_calendar_print() #3 /home/assolenjeux/public_html/wp-includes/class-wp-hook.php(324): my_calendar_print_view('') #4 /home/assolenjeux/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #5 /home/assolenjeux/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #6 /home/assolenjeux/public_html/wp-includes/template-loader.php(13): do_action('template_redire...') #7 /home/assolenjeux/public_html/wp-blog-header.php(19): require_once('/home/assolenje...') #8 /home/assolenjeux/public_html/index.php(17): require('/home/assolenje...') #9 {main} thrown in /home/assolenjeux/public_html/wp-content/plugins/my-calendar/my-calendar-output.php on line 1946