The workbench failed to connect to the server (Error: undefined) #4747

After successfully deploy "code-server vscode" on my server and login success i see this undefined error

An unexpected error occurred that requires a reload of this page.
The workbench failed to connect to the server (Error: undefined)

page show up and it can run on browser but that's pop up error prevent me to do anything since it will reload when i closed it

I check console.log too from chrome and show some error like this

errors.ts:28 Uncaught Error: No file system provider found for resource 'vscode-remote:/var/lib/code-server/User/settings.json'
errors.ts:28 Uncaught Error: No file system provider found for resource 'vscode-remote:/var/lib/code-server/User/tasks.json'

my nginx proxy pass conf

location /vscode/ {
       #include proxy_params;
       proxy_pass  http://127.0.0.1:7171/;
       # WebSocket support
       proxy_http_version 1.1;
       proxy_set_header Upgrade $http_upgrade;
       proxy_set_header Connection "upgrade";
}

never find this similar issue so i came to ask it

code-server version 4.0.1
web server nginx
os ubuntu 20