502 Bad GateWay in Nginx With AWS Load balancer

Hi

We are facing 502 Bad Gateway errors often. check the error log we found
frappe-bench/logs/node-socketio.log (We used AWS Load Balancer)

It a Load balancer error or Ngnix error

The Following Error log:

error: Error: cannot GET /api/method/frappe.realtime.can_subscribe_doc?sid=f1ea94a151bff468a0c949cd5efdc2eb871d678fcce9748b84d3f37c&doctype=Sales%20Order&docname=SAL-ORD-2022-00046 (502)
at Response.toError (/home/erpriver/erpnext/frappe-bench/apps/frappe/node_modules/superagent/lib/node/response.js:94:15)
at ResponseBase._setStatusProperties (/home/erpriver/erpnext/frappe-bench/apps/frappe/node_modules/superagent/lib/response-base.js:123:16)
at new Response (/home/erpriver/erpnext/frappe-bench/apps/frappe/node_modules/superagent/lib/node/response.js:41:8)
at Request._emitResponse (/home/erpriver/erpnext/frappe-bench/apps/frappe/node_modules/superagent/lib/node/index.js:752:20)
at IncomingMessage. (/home/erpriver/erpnext/frappe-bench/apps/frappe/node_modules/superagent/lib/node/index.js:916:38)
at IncomingMessage.emit (events.js:412:35)
at endReadableNT (internal/streams/readable.js:1334:12)
at processTicksAndRejections (internal/process/task_queues.js:82:21) {
status: 502,
text: ‘\r\n’ +
‘502 Bad Gateway\r\n’ +
‘\r\n’ +

502 Bad Gateway

\r\n’ +
‘\r\n’ +
‘\r\n’,
method: ‘GET’,
path: ‘/api/method/frappe.realtime.can_subscribe_doc?sid=f1ea94a151bff468a0c949cd5efdc2eb871d678fcce9748b84d3f37c&doctype=Sales%20Order&docname=SAL-ORD-2022-00046’
Unable to join chat room. Error: Bad Gateway
Unable to join chat room. Error: Bad Gateway @revant_one @brian_pond @ankush