nextjs, etherjs, invalid address or ENS name

Question

I'm using Nextjs.

on sample.jsx

  console.log(address)// 0xd56A6DB7d844722627473C07f840c2604E622161

  console.log(typeof(address)) // string

 const ethers = require('ethers')
 let url = "https://sample.net:8293";
 let provider = new ethers.providers.JsonRpcProvider(url);
  
    let balance = await provider.getBalance(address)

Error: invalid address or ENS name (argument="name", value=undefined, code=INVALID_ARGUMENT, version=providers/5.7.2)

WHY?