The code is in src/socket.io/posts.js, but I can't find the topic_id and app.currentRoom you mention.

I got this error in browser client, don't know what it will take affect and how to solve?

WebSocket connection to 'ws://<myhost>/socket.io/?EIO=3&transport=websocket&sid=wW5Z4UKR9a_ZHKHkAAAF' failed: Error during WebSocket handshake: Unexpected response code: 400

which port it's using, I just open the port 4567 in firewall.

temp solution:

-- 	if(!data || !data.pid || !data.room_id) {
++ if(!data || !data.pid) {

the debug output as below:

4/6 03:55 [387] - info: command=`"upvote"
4/6 03:55 [387] - info: eventName=`"voted"
4/6 03:55 [387] - info: notification=`"notifications:upvoted_your_post_in"
4/6 03:55 [387] - info: data=`{"pid":"85","room_id":""}
4/6 03:55 [387] - error: favouriteCommand invalid-data

Does anyone have idea what's going wrong?

I found the error is come from favouriteCommand, and added some debug output:

    function favouriteCommand(socket, command, eventName, notification, data, callback) {
    winston.info('command=`' + JSON.stringify(command) );
    winston.info('eventName=`' + JSON.stringify(eventName) );
    winston.info('notification=`' + JSON.stringify(notification) );
    winston.info('data=`' + JSON.stringify(data) );

        if(!data || !data.pid || !data.room_id) {
    winston.error('favouriteCommand invalid-data');
            return callback(new Error('[[error:invalid-data]]'));
        }

I had changed to nodebb-theme-persona, it has the same problem.

1. CentOS release 6.6 (Final)

2. #git rev-parse HEAD
   d9af2242a7c7fc92318a83bd46e4f849094960f2

3. I am not using nodebb-theme-persona, but nodebb-theme-lavender.

4. error at client-side
   "Error
   Invalid Data"

@Mega Thanks Mega!
I know this can work, I expect the formal release for this.

nodebb-plugin-emailer-local can not get config value from plugin settings.
I just hard code and make it works.
BTW, secureConnection setting is useful, when using default sendmail service in Linux.

var transportOptions = {
secureConnection: false,
//        host: Meta.config['emailer:local:host'],
//        port: Meta.config['emailer:local:port']
    host: "10.175.191.88",
    port: 25
};

I want to vote a post in my nodebb, but nothing happen, no error log.
how can I debug?