API can not work any more

[benhaben]

package main

import (
	"log"
	"time"

	"context"
	"fmt"

	"github.com/gagliardetto/solana-go/rpc"
	"golang.org/x/time/rate"
)

func main() {
	cluster := rpc.MainNetBeta

	rpcClient := rpc.NewWithCustomRPCClient(rpc.NewWithLimiter(
		cluster.RPC,
		rate.Every(time.Second), // time frame
		5,                       // limit of requests per time frame
	))

	// Get the recent blockhash:

	recent, err := rpcClient.GetLatestBlockhash(context.TODO(), rpc.CommitmentFinalized)
	if err != nil {
		log.Fatalf("Failed to get latest blockhash: %v", err)
	}

	fmt.Printf("  Blockhash: %s\n", recent.Value.Blockhash)
	fmt.Printf("  LastValidBlockHeight: %d\n", recent.Value.LastValidBlockHeight)
}

report error ： Failed to get latest blockhash: rpc call getLatestBlockhash() on https://api.mainnet-beta.solana.com: Post "https://api.mainnet-beta.solana.com": read tcp 127.0.0.1:60388->127.0.0.1:33210: read: connection reset by peer