Cannot use object of type WP_Error as array

    #0 /home/inspiratdm/www/wp-content/plugins/leaflet-maps-marker-pro/inc/class-mmp-rewrite.php(223): require_once()
#1 /home/inspiratdm/www/wp-includes/class-wp-hook.php(287): MMP_Rewrite::redirect_to_endpoint('')
#2 /home/inspiratdm/www/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array)
#3 /home/inspiratdm/www/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#4 /home/inspiratdm/www/wp-includes/template-loader.php(13): do_action('template_redire...')
#5 /home/inspiratdm/www/wp-blog-header.php(19): require_once('/home/inspiratd...')
#6 /home/inspiratdm/www/index.php(17): require('/home/inspiratd...')
#7 {main}