Retry Woocommerce Pending and subscriptions if your gateway has an error or fails. Go to your site ?retry=1

woocommerce-pending-subscriptions-retry.php

<?php

/**
 * Plugin Name: WooCommerce Subscriptions Pending payment fix
 */
 
 $wc_pending_payment_fix = new wc_pending_payment_fix;
 add_action('init', array($wc_pending_payment_fix, 'retry_payments'));
 class wc_pending_payment_fix{
	 
	 
	 
	 
	function retry_payments(){
			global $wpdb;
			
		
			if($_GET['retry'] == 1){
	
				$failed_renewal_orders = get_posts( array(
			'date_query' => array(
								array(
									'column' => 'post_date_gmt',
									'after'  => '1 month ago',
									),
								),
			'posts_per_page' =>-1,
			'post_status'    => array('wc-failed','wc-pending'),
			'post_type'      => 'shop_order',		
			'orderby'        => 'date',
			'order'          => 'desc'
		) );
		

				echo count($failed_renewal_orders);
				foreach($failed_renewal_orders as $renewal_order){
						
					$parent_subscription = wcs_get_subscription(get_post_meta($renewal_order->ID,'_subscription_renewal',true));
					if($parent_subscription){
					
						if($parent_subscription->post->post_status == 'wc-on-hold'){
						if(get_post_meta($parent_subscription->id, '_payment_method_title', true) == 'Credit Card'){
					
							
					$subscription = wcs_get_subscription($parent_subscription->id);	
					$subscription->update_status( 'active' );
					do_action( 'woocommerce_scheduled_subscription_payment', $subscription->id );
					wp_delete_post( $renewal_order->ID );
					unset($subscription);
					add_post_meta($parent_subscription->id, '_processed_retry', 1,true);
						
						}
						}
					}
				}
		
			exit;
			}
			
	}
	 
	 
 }