How to overcome Cannot read properties of undefined (reading 'group') error?

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Handle polling update error: TypeError: Cannot read properties of undefined (reading 'group')
at /home/runner/LES/index.js:532:46
at next (/home/runner/LES/node_modules/middleware-io/lib /index.js:198:13)
at /home/runner/LES/node_modules/middleware-io/lib/index.js:198:39
at /home/runner/LES/node_modules/vk-io/lib/index. js:6665:86
at next (/home/runner/LES/node_modules/middleware-io/lib/index.js:198:13)
at /home/runner/LES/node_modules/middleware-io/lib/index.js :198:39
at /home/runner/LES/node_modules/vk-io/lib/index.js:6665:86
at next (/home/runner/LES/node_modules/middleware-io/lib/index.js:198:13)
at /home/runner/LES/node_modules/middleware-io/lib/index.js:198:39
/ home/runner/LES/index.js:494
chats[message.chatId].users[c.member_id].group == 3
^

TypeError: Cannot read properties of undefined (reading 'group')
at /home/runner/LES /index.js:494:43
at Array.map()
at /home/runner/LES/index.js:491:9

if(!chats[message.chatId]) {
    chats[message.chatId] = {
           activate: false,
            motd: "",
            name: 0,
            flood: 0,
            prefix: "/",
            banlength: 0,
            owner: 0,
            owname: ``,
            tex: false,
            count: 0,
            smilemsg: 0,
            commsg: 0,
            matmsg: 0,
            symbols: 0,
            forwarded_messages: 0,
            photos: 0,
            videos: 0,
            audios: 0,
            stikers: 0,
            wall_posts: 0,
            documents: 0,
            audio_messages: 0,
            dostup: {
              warn: 1,
              unwarn: 1,
              ban: 3,
              unban: 3,
              permban: 4,
              kick: 2,
              prefix: 3,
              event: 3,
              setrules: 3,
              helper: 4,
              admin: 3,
              moder: 3,
              user: 3,
              tex: 3,
              detail: 2,
              chatcfg: 3,
              symbols: 3,
              warns: 3,
              tempban: 3,
              motd: 3
            },
            bgold: false,
            setting: {
             symbols: 800,
             warns: 3
            },
            settings: {
              url: false,
              invite: true,
              kick_leave: false,
              mute: false,
              protectgroup1: false
            },
       rules: "Правила не установлены",
       title: "none",
            key: `${randomUid()}`,
         banned: [],
           lastname: {},
         groups: {},
         groups2: [],
           invites: {},
           names: [],
         users: {}
    }
   }
    chats[message.chatId].motd = "Добро пожаловать в беседу, чтобы узнать правила, напишите "+ chats[message.chatId].prefix +"rules";


vk.api.messages.getConversationMembers({ peer_id: message.peerId, fields: "id", group_id: 210644238 }).then(function(response){
let c = response;
c.items.map(function(c){
if(c.member_id < 1) return;
 vk.api.call('users.get', {
  user_ids: c.member_id,
  fields: "photo_max,city,verified,status,domain,photo_id,sex,last_seen,first_name"
    }).then(res => {
     let user = res[0];
     if(!chats[message.chatId].users[c.member_id]){
        chats[message.chatId].users[c.member_id] = {
                  id: c.member_id,
                  name: `${user.first_name} ${user.last_name}`,
                  warns: 0,
                  active: 0,
                  uinvite: 0,
                  uchat: true,
                  chatdata: `${data()}`,
                  leave: false,
                  top: false,
                   stats: {
                     msg: 0,
                     smilemsg: 0,
                     commsg: 0,
                     matmsg: 0,
                     symbols: 0,
                     forwarded_messages: 0,
                     photos: 0,
                     videos: 0,
                     audios: 0,
                     stikers: 0,
                     wall_posts: 0,
                     documents: 0,
                     audio_messages: 0
                  },
                  tban: 0,
                  ban: false,
                  isBanned: false,
                  permanently: false,
                  group: 0
           }
       }

Строка 522:46 >  if(chats[message.chatId].users[message.user].group == 0){ 
if(chats[message.chatId].settings.mute == true){
  
var smiles = message.text.match(/([\uD800-\uDBFF][\uDC00-\uDFFF])/g)
    if(smiles != null) {
      vk.api.messages.removeChatUser({ chat_id: message.chatId, member_id: message.user })
  }

message.attachments.map(function(a) {
    if (a.type == 'photo') {
      vk.api.messages.removeChatUser({ chat_id: message.chatId, member_id: message.user })
      
    } else if (a.type == 'sticker') {
        vk.api.messages.removeChatUser({ chat_id: message.chatId, member_id: message.user })
        
    } else if (a.type == 'video') {
        vk.api.messages.removeChatUser({ chat_id: message.chatId, member_id: message.user })
        
    } else if (a.type == 'audio') {
       vk.api.messages.removeChatUser({ chat_id: message.chatId, member_id: message.user })
       
    } else if (a.type == 'wall') {
        vk.api.messages.removeChatUser({ chat_id: message.chatId, member_id: message.user })
        
    } else if (a.type == 'doc') {
       vk.api.messages.removeChatUser({ chat_id: message.chatId, member_id: message.user })
       
    } else if (a.type == 'audio_message') {
    vk.api.messages.removeChatUser({ chat_id: message.chatId, member_id: message.user })
    
    }
});

Answer 1

if(chats[message.chatId].users[message.user]?.group == 0)

Answer 2

I solved that error, still appeared:

Ту ошибку решил, ещё появилась:

if(!ussserrs.find(x=> x.id === message.senderId))
^

TypeError: ussserrs.find is not a function