新搭建Nuxt3应用启动时报Nitro代理错误：proxyReq.appendHeader is not a function

长期使用Nuxt2，近期尝试搭建Nuxt3应用。按照官方安装文档完成部署后，启动本地服务器时出现如下错误：

ERROR  [uncaughtException] proxyReq.appendHeader is not a function

该错误与Nuxt使用的Nitro引擎相关，堆栈信息如下：

at ProxyServer.<anonymous> (/C:/Users/cards/Documents/job-hunt/job-site/node_modules/nitropack/dist/chunks/server.mjs:329:18)
  at ProxyServer.emit (node:events:527:28)
  at ClientRequest.<anonymous> (/C:/Users/cards/Documents/job-hunt/job-site/node_modules/httpxy/dist/index.mjs:256:16)
  at ClientRequest.emit (node:events:527:28)
  at tickOnSocket (node:_http_client:764:7)
  at onSocketNT (node:_http_client:827:5)
  at process.processTicksAndRejections (node:internal/process/task_queues:83:21)

我未对应用做任何自定义修改，却在初始启动阶段触发该错误，且未找到同类问题案例。报错代码段如下：

proxy.proxy.on("proxyReq", (proxyReq, req) => {
    if (!proxyReq.hasHeader("x-forwarded-for")) {
      const address = req.socket.remoteAddress;
      if (address) {
        proxyReq.appendHeader("x-forwarded-for", address);
      }
    }
    if (!proxyReq.hasHeader("x-forwarded-port")) {
      const localPort = req?.socket?.localPort;
      if (localPort) {
        proxyReq.setHeader("x-forwarded-port", req.socket.localPort);
      }
    }
    if (!proxyReq.hasHeader("x-forwarded-Proto")) {
      const encrypted = req?.connection?.encrypted;
      proxyReq.setHeader("x-forwarded-proto", encrypted ? "https" : "http");
    }
  });

错误触发的具体行是：proxyReq.appendHeader("x-forwarded-for", address);

当前使用版本：Nuxt 3.10.3、Nitro 2.9.1

内容的提问来源于stack exchange，提问作者Paul Carlson