Upgrade to 1.4.0 - Issues with websocket?

[fabian]

Hi,
I tried to upgrade from an v1 weekly build to the 1.4.0. I had to upgrade nodejs to version 4.7.0 to run the upgrade script, but then it worked.
But when I try to startup the server, the following error message shows on the first hit:

20/12 13:32:33 [21369] - info: Enabling 'trust proxy'
20/12 13:32:33 [21369] - info: NodeBB is now listening on: 0.0.0.0:4567
20/12 13:33:06 [21369] - error: TypeError: Cannot read property 'prototype' of undefined
    at Server.onWebSocket (/srv/nodebb/node_modules/engine.io/lib/server.js:358:40)
    at /srv/nodebb/node_modules/engine.io/lib/server.js:343:12
    at completeHybiUpgrade2 (/srv/nodebb/node_modules/ws/lib/WebSocketServer.js:284:5)
    at completeHybiUpgrade1 (/srv/nodebb/node_modules/ws/lib/WebSocketServer.js:309:13)
    at WebSocketServer.handleHybiUpgrade (/srv/nodebb/node_modules/ws/lib/WebSocketServer.js:337:3)
    at WebSocketServer.handleUpgrade (/srv/nodebb/node_modules/ws/lib/WebSocketServer.js:173:26)
    at /srv/nodebb/node_modules/engine.io/lib/server.js:342:13
    at Server.verify (/srv/nodebb/node_modules/engine.io/lib/server.js:142:12)
    at Server.handleUpgrade (/srv/nodebb/node_modules/engine.io/lib/server.js:331:8)
    at Server.<anonymous> (/srv/nodebb/node_modules/engine.io/lib/server.js:451:14)
    at emitThree (events.js:97:13)
    at Server.emit (events.js:175:7)
    at onParserExecuteCommon (_http_server.js:409:14)
    at HTTPParser.onParserExecute (_http_server.js:377:5)
TypeError: Cannot read property 'prototype' of undefined
    at Server.onWebSocket (/srv/nodebb/node_modules/engine.io/lib/server.js:358:40)
    at /srv/nodebb/node_modules/engine.io/lib/server.js:343:12
    at completeHybiUpgrade2 (/srv/nodebb/node_modules/ws/lib/WebSocketServer.js:284:5)
    at completeHybiUpgrade1 (/srv/nodebb/node_modules/ws/lib/WebSocketServer.js:309:13)
    at WebSocketServer.handleHybiUpgrade (/srv/nodebb/node_modules/ws/lib/WebSocketServer.js:337:3)
    at WebSocketServer.handleUpgrade (/srv/nodebb/node_modules/ws/lib/WebSocketServer.js:173:26)
    at /srv/nodebb/node_modules/engine.io/lib/server.js:342:13
    at Server.verify (/srv/nodebb/node_modules/engine.io/lib/server.js:142:12)
    at Server.handleUpgrade (/srv/nodebb/node_modules/engine.io/lib/server.js:331:8)
    at Server.<anonymous> (/srv/nodebb/node_modules/engine.io/lib/server.js:451:14)
    at emitThree (events.js:97:13)
    at Server.emit (events.js:175:7)
    at onParserExecuteCommon (_http_server.js:409:14)
    at HTTPParser.onParserExecute (_http_server.js:377:5)

I already tried to delete the node_modules and reinstalled them with npm install --production but nothing changed.
What can I do?

[fabian]

I disabled websocket support in config.js

"socket.io": {
  "transports": ["polling"]
}

And the board is back again.
This is ok for me, since websockets never worked with the proxy setup...