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While this PR seems to make sense, a small reproduction of the error would really help be sure this block is needed and the error was not fixed by previous commit as pointed in the linked issue

1. install docker

brew install --cask docker

2. run grafana docker

docker run -d -p 3000:3000 --name grafana grafana/grafana-oss:9.2.6

3. change grafana docker for grafana prefix

docker cp grafana:/etc/grafana/grafana.ini ./
## change config grafana.ini to the following and enable the two config
root_url = %(protocol)s://%(domain)s:%(http_port)s/grafana
serve_from_sub_path = true
## change config end
cp ./grafana.ini grafana:/etc/grafana/grafana.ini
docker restart grafana

4. create vite demo

npx create-vue vite-repo

5. set proxy to grafana

  server:{
    proxy:{
        '^/grafana': {
            changeOrigin: true,
            ws: true,
            target: 'http://localhost:3000/',
        }
    }
  }

6. run the demo and navigate to /grafana we can see the crash still on 4.3.5

or run the demo navigate to /grafana or /test

/ecosystem-ci run

📝 Ran ecosystem CI: Open

Is the ecosystem CI running with an old main base maybe?
Tested locally, can reproduce and patching node_module with this code correctly fix the crash.