my new version is the new yes i disable plugins and i tried to downgrade it into old version but keep me this error

yes tnx man for the help

i already have this error when i click my navigation on my nodebb forum my nodebb are restart always what shall we do

hi i got this error on my nodebb how can i fix this problem ..

and sometimes allways say
socket eerro 127.0.0.1:2700
and i got error
how can i fix this

Thank you
More Power

i will remove 300 on my url and remove bse url

{
"url":"http://site.com:3000",
"base_url": "http://site.com:3000",
"secret": "secrertKeyyy",
"database": "mongo",
"port":"3000",
"bind_address":"0.0.0.0",
"mongo": {
"host": "127.0.0.1",
"port": "27017",
"password": "",
"database": "0"
},
"use_port":false
}

here is my conifg.json how can i config my nginx help me

here is my config ..
and i got error 205 getwayerror on my nignx ihope that you help me

node.js running locally on port 3000

upstream node {
    server 127.0.0.1:3000;
    keepalive 256; # not necessary
}
 
 
 the public nginx server instance running on port 80
server {
    listen 80;
    server_name <mysite.com>; # domain of my site
    access_log /var/log/nginx/<mysite>.access.log;
    error_log /var/log/nginx/<mysite>.error.log;
     
    # supposedly prevents 502 bad gateway error;
    # ultimately not necessary in my case
    large_client_header_buffers 8 32k;
 
    # run the app on the root directory
    location / {
 
        # the following is required for WebSockets
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_set_header X-NginX-Proxy true;
  
        # supposedly prevents 502 bad gateway error;
        # ultimately not necessary in my case
        proxy_buffers 8 32k;
        proxy_buffer_size 64k;
         
        # the following is required
        proxy_pass http://node;
        proxy_redirect off;
  
        # the following is required as well for WebSockets
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
 
        tcp_nodelay on; # not necessary
    }
 }