Add some variable checks

packages/rocketchat-authorization/client/hasPermission.coffee

@@ -1,7 +1,7 @@
 atLeastOne = (permissions, scope) ->
 	return _.some permissions, (permissionId) ->
 		permission = ChatPermissions.findOne permissionId
-		return _.some permission.roles, (roleName) ->
+		return permission and _.some permission.roles, (roleName) ->
 			role = RocketChat.models.Roles.findOne roleName
 			roleScope = role?.scope
 			return RocketChat.models[roleScope]?.isUserInRole?(Meteor.userId(), roleName, scope)

packages/rocketchat-livechat/client/views/app/tabbar/visitorNavigation.js

@@ -8,7 +8,9 @@ Template.visitorNavigation.helpers({
 	pageVisited() {
 		const room = ChatRoom.findOne({ _id: this.rid }, { fields: { 'v.token': 1 } });
 
+		if (room && room.v && room.v.token) {
 			return LivechatPageVisited.find({ token: room.v.token }, { sort: { ts: -1 } });
+		}
 	},
 
 	pageTitle() {

packages/rocketchat-livechat/server/lib/Livechat.js

@@ -108,6 +108,9 @@ RocketChat.Livechat = {
 
 			if (s.trim(email) !== '' && (existingUser = RocketChat.models.Users.findOneGuestByEmailAddress(email))) {
 				if (loginToken) {
+					if (!updateUser.$addToSet) {
+						updateUser.$addToSet = {};
+					}
 					updateUser.$addToSet['services.resume.loginTokens'] = loginToken;
 				}