How to fix websocket error?

Thanks for replys @amy.blais

I don’t have reverse proxy configured with IIS

my config.json contents is

{
“ServiceSettings”: {
“SiteURL”: “”,
“WebsocketURL”: “”,
“LicenseFileLocation”: “”,
“ListenAddress”: “:8065”,
“ConnectionSecurity”: “”,
“TLSCertFile”: “”,
“TLSKeyFile”: “”,
“UseLetsEncrypt”: false,
“LetsEncryptCertificateCacheFile”: “./config/letsencrypt.cache”,
“Forward80To443”: false,
“ReadTimeout”: 300,
“WriteTimeout”: 300,
“MaximumLoginAttempts”: 10,
“GoroutineHealthThreshold”: -1,
“GoogleDeveloperKey”: “”,
“EnableOAuthServiceProvider”: false,
“EnableIncomingWebhooks”: true,
“EnableOutgoingWebhooks”: true,
“EnableCommands”: true,
“EnableOnlyAdminIntegrations”: true,
“EnablePostUsernameOverride”: false,
“EnablePostIconOverride”: false,
“EnableLinkPreviews”: false,
“EnableTesting”: false,
“EnableDeveloper”: true,
“EnableSecurityFixAlert”: true,
“EnableInsecureOutgoingConnections”: false,
“AllowedUntrustedInternalConnections”: “”,
“EnableMultifactorAuthentication”: false,
“EnforceMultifactorAuthentication”: false,
“EnableUserAccessTokens”: false,
“AllowCorsFrom”: “*”,
“AllowCookiesForSubdomains”: false,
“SessionLengthWebInDays”: 30,
“SessionLengthMobileInDays”: 30,
“SessionLengthSSOInDays”: 30,
“SessionCacheInMinutes”: 10,
“SessionIdleTimeoutInMinutes”: 0,
“WebsocketSecurePort”: 443,
“WebsocketPort”: 80,
“WebserverMode”: “gzip”,
“EnableCustomEmoji”: false,
“EnableEmojiPicker”: true,
“EnableGifPicker”: false,
“GfycatApiKey”: “2_KtH_W5”,
“GfycatApiSecret”: “3wLVZPiswc3DnaiaFoLkDvB4X0IV6CpMkj4tf2inJRsBY6-FnkT08zGmppWFgeof”,
“RestrictCustomEmojiCreation”: “all”,
“RestrictPostDelete”: “all”,
“AllowEditPost”: “always”,
“PostEditTimeLimit”: -1,
“TimeBetweenUserTypingUpdatesMilliseconds”: 5000,
“EnablePostSearch”: true,
“EnableUserTypingMessages”: true,
“EnableChannelViewedMessages”: true,
“EnableUserStatuses”: true,
“ExperimentalEnableAuthenticationTransfer”: true,
“ClusterLogTimeoutMilliseconds”: 2000,
“CloseUnusedDirectMessages”: false,
“EnablePreviewFeatures”: true,
“EnableTutorial”: true,
“ExperimentalEnableDefaultChannelLeaveJoinMessages”: true,
“ExperimentalGroupUnreadChannels”: “disabled”,
“ImageProxyType”: “”,
“ImageProxyURL”: “”,
“ImageProxyOptions”: “”,
“EnableAPITeamDeletion”: false,
“ExperimentalEnableHardenedMode”: false,
“ExperimentalLimitClientConfig”: false,
“EnableEmailInvitations”: false
},
“TeamSettings”: {
“SiteName”: “Mattermost”,
“MaxUsersPerTeam”: 50,
“EnableTeamCreation”: true,
“EnableUserCreation”: true,
“EnableOpenServer”: false,
“EnableUserDeactivation”: false,
“RestrictCreationToDomains”: “”,
“EnableCustomBrand”: false,
“CustomBrandText”: “”,
“CustomDescriptionText”: “”,
“RestrictDirectMessage”: “any”,
“RestrictTeamInvite”: “all”,
“RestrictPublicChannelManagement”: “all”,
“RestrictPrivateChannelManagement”: “all”,
“RestrictPublicChannelCreation”: “all”,
“RestrictPrivateChannelCreation”: “all”,
“RestrictPublicChannelDeletion”: “all”,
“RestrictPrivateChannelDeletion”: “all”,
“RestrictPrivateChannelManageMembers”: “all”,
“EnableXToLeaveChannelsFromLHS”: false,
“UserStatusAwayTimeout”: 300,
“MaxChannelsPerTeam”: 2000,
“MaxNotificationsPerChannel”: 1000,
“EnableConfirmNotificationsToChannel”: true,
“TeammateNameDisplay”: “username”,
“ExperimentalEnableAutomaticReplies”: false,
“ExperimentalHideTownSquareinLHS”: false,
“ExperimentalTownSquareIsReadOnly”: false,
“ExperimentalPrimaryTeam”: “”
},
“ClientRequirements”: {
“AndroidLatestVersion”: “”,
“AndroidMinVersion”: “”,
“DesktopLatestVersion”: “”,
“DesktopMinVersion”: “”,
“IosLatestVersion”: “”,
“IosMinVersion”: “”
},
“SqlSettings”: {
“DriverName”: “postgres”,
“DataSource”: “postgres://mmuser:mmuser@192.168.15.100:5432/mattermost01?sslmode=disable\u0026connect_timeout=10”,
“DataSourceReplicas”: ,
“DataSourceSearchReplicas”: ,
“MaxIdleConns”: 20,
“ConnMaxLifetimeMilliseconds”: 3600000,
“MaxOpenConns”: 300,
“Trace”: false,
“AtRestEncryptKey”: “kto5nxqzescipjo9awdon8u8469b9ong”,
“QueryTimeout”: 30
},
“LogSettings”: {
“EnableConsole”: true,
“ConsoleLevel”: “DEBUG”,
“ConsoleJson”: true,
“EnableFile”: true,
“FileLevel”: “INFO”,
“FileJson”: true,
“FileLocation”: “”,
“EnableWebhookDebugging”: true,
“EnableDiagnostics”: true
},
“PasswordSettings”: {
“MinimumLength”: 5,
“Lowercase”: false,
“Number”: false,
“Uppercase”: false,
“Symbol”: false
},
“FileSettings”: {
“EnableFileAttachments”: true,
“EnableMobileUpload”: true,
“EnableMobileDownload”: true,
“MaxFileSize”: 52428800,
“DriverName”: “local”,
“Directory”: “./data/”,
“EnablePublicLink”: false,
“PublicLinkSalt”: “ugy1yu8j5fk1frb4djmdsyadjwc1roum”,
“InitialFont”: “nunito-bold.ttf”,
“AmazonS3AccessKeyId”: “”,
“AmazonS3SecretAccessKey”: “”,
“AmazonS3Bucket”: “”,
“AmazonS3Region”: “”,
“AmazonS3Endpoint”: “s3.amazonaws.com”,
“AmazonS3SSL”: true,
“AmazonS3SignV2”: false,
“AmazonS3SSE”: false,
“AmazonS3Trace”: false
},
“EmailSettings”: {
“EnableSignUpWithEmail”: true,
“EnableSignInWithEmail”: true,
“EnableSignInWithUsername”: true,
“SendEmailNotifications”: true,
“UseChannelInEmailNotifications”: false,
“RequireEmailVerification”: false,
“FeedbackName”: “”,
“FeedbackEmail”: “test@example.com”,
“FeedbackOrganization”: “”,
“EnableSMTPAuth”: false,
“SMTPUsername”: “”,
“SMTPPassword”: “”,
“SMTPServer”: “dockerhost”,
“SMTPPort”: “2500”,
“ConnectionSecurity”: “”,
“InviteSalt”: “yon54zupue7eew4z5ocruo7x1bj9k9of”,
“SendPushNotifications”: false,
“PushNotificationServer”: “”,
“PushNotificationContents”: “generic”,
“EnableEmailBatching”: false,
“EmailBatchingBufferSize”: 256,
“EmailBatchingInterval”: 30,
“EnablePreviewModeBanner”: true,
“SkipServerCertificateVerification”: false,
“EmailNotificationContentsType”: “full”,
“LoginButtonColor”: “”,
“LoginButtonBorderColor”: “”,
“LoginButtonTextColor”: “”
},
“RateLimitSettings”: {
“Enable”: false,
“PerSec”: 10,
“MaxBurst”: 100,
“MemoryStoreSize”: 10000,
“VaryByRemoteAddr”: true,
“VaryByUser”: false,
“VaryByHeader”: “”
},
“PrivacySettings”: {
“ShowEmailAddress”: true,
“ShowFullName”: true
},
“SupportSettings”: {
“TermsOfServiceLink”: “Terms of Use - Mattermost Open Source Collaboration Platform”,
“PrivacyPolicyLink”: “Mattermost Privacy Policy - Open Source Messaging”,
“AboutLink”: “Mattermost overview — Mattermost documentation”,
“HelpLink”: “Homepage | Mattermost Academy”,
“ReportAProblemLink”: “How to contribute to Mattermost - Mattermost Handbook”,
“SupportEmail”: “feedback@mattermost.com
},
“AnnouncementSettings”: {
“EnableBanner”: false,
“BannerText”: “”,
“BannerColor”: “#f2a93b”,
“BannerTextColor”: “#333333”,
“AllowBannerDismissal”: true
},
“ThemeSettings”: {
“EnableThemeSelection”: true,
“DefaultTheme”: “default”,
“AllowCustomThemes”: true,
“AllowedThemes”:
},
“GitLabSettings”: {
“Enable”: false,
“Secret”: “”,
“Id”: “”,
“Scope”: “”,
“AuthEndpoint”: “”,
“TokenEndpoint”: “”,
“UserApiEndpoint”: “”
},
“GoogleSettings”: {
“Enable”: false,
“Secret”: “”,
“Id”: “”,
“Scope”: “profile email”,
“AuthEndpoint”: “Sign in - Google Accounts”,
“TokenEndpoint”: “https://www.googleapis.com/oauth2/v4/token”,
“UserApiEndpoint”: “https://www.googleapis.com/plus/v1/people/me
},
“Office365Settings”: {
“Enable”: false,
“Secret”: “”,
“Id”: “”,
“Scope”: “User.Read”,
“AuthEndpoint”: “Sign in to your account”,
“TokenEndpoint”: “Sign in to your account”,
“UserApiEndpoint”: “https://graph.microsoft.com/v1.0/me
},
“LdapSettings”: {
“Enable”: false,
“EnableSync”: false,
“LdapServer”: “”,
“LdapPort”: 389,
“ConnectionSecurity”: “”,
“BaseDN”: “”,
“BindUsername”: “”,
“BindPassword”: “”,
“UserFilter”: “”,
“FirstNameAttribute”: “”,
“LastNameAttribute”: “”,
“EmailAttribute”: “”,
“UsernameAttribute”: “”,
“NicknameAttribute”: “”,
“IdAttribute”: “”,
“PositionAttribute”: “”,
“LoginIdAttribute”: “”,
“SyncIntervalMinutes”: 60,
“SkipCertificateVerification”: false,
“QueryTimeout”: 60,
“MaxPageSize”: 0,
“LoginFieldName”: “”,
“LoginButtonColor”: “”,
“LoginButtonBorderColor”: “”,
“LoginButtonTextColor”: “”
},
“ComplianceSettings”: {
“Enable”: false,
“Directory”: “./data/”,
“EnableDaily”: false
},
“LocalizationSettings”: {
“DefaultServerLocale”: “en”,
“DefaultClientLocale”: “en”,
“AvailableLocales”: “”
},
“SamlSettings”: {
“Enable”: false,
“EnableSyncWithLdap”: false,
“Verify”: true,
“Encrypt”: true,
“IdpUrl”: “”,
“IdpDescriptorUrl”: “”,
“AssertionConsumerServiceURL”: “”,
“ScopingIDPProviderId”: “”,
“ScopingIDPName”: “”,
“IdpCertificateFile”: “”,
“PublicCertificateFile”: “”,
“PrivateKeyFile”: “”,
“FirstNameAttribute”: “”,
“LastNameAttribute”: “”,
“EmailAttribute”: “”,
“UsernameAttribute”: “”,
“NicknameAttribute”: “”,
“LocaleAttribute”: “”,
“PositionAttribute”: “”,
“LoginButtonText”: “With SAML”,
“LoginButtonColor”: “”,
“LoginButtonBorderColor”: “”,
“LoginButtonTextColor”: “”
},
“NativeAppSettings”: {
“AppDownloadLink”: “Host Mattermost on Your Own Infrastructure”,
“AndroidAppDownloadLink”: “https://about.mattermost.com/mattermost-android-app/”,
“IosAppDownloadLink”: “‎Mattermost on the App Store
},
“ClusterSettings”: {
“Enable”: false,
“ClusterName”: “”,
“OverrideHostname”: “”,
“UseIpAddress”: true,
“UseExperimentalGossip”: false,
“ReadOnlyConfig”: true,
“GossipPort”: 8074,
“StreamingPort”: 8075,
“MaxIdleConns”: 100,
“MaxIdleConnsPerHost”: 128,
“IdleConnTimeoutMilliseconds”: 90000
},
“MetricsSettings”: {
“Enable”: false,
“BlockProfileRate”: 0,
“ListenAddress”: “:8067”
},
“ExperimentalSettings”: {
“ClientSideCertEnable”: false,
“ClientSideCertCheck”: “secondary”
},
“AnalyticsSettings”: {
“MaxUsersForStatistics”: 2500
},
“WebrtcSettings”: {
“Enable”: false,
“GatewayWebsocketUrl”: “”,
“GatewayAdminUrl”: “”,
“GatewayAdminSecret”: “”,
“StunURI”: “”,
“TurnURI”: “”,
“TurnUsername”: “”,
“TurnSharedKey”: “”
},
“ElasticsearchSettings”: {
“ConnectionUrl”: “http://dockerhost:9200”,
“Username”: “elastic”,
“Password”: “changeme”,
“EnableIndexing”: false,
“EnableSearching”: false,
“Sniff”: true,
“PostIndexReplicas”: 1,
“PostIndexShards”: 1,
“AggregatePostsAfterDays”: 365,
“PostsAggregatorJobStartTime”: “03:00”,
“IndexPrefix”: “”,
“LiveIndexingBatchSize”: 1,
“BulkIndexingTimeWindowSeconds”: 3600,
“RequestTimeoutSeconds”: 30
},
“DataRetentionSettings”: {
“EnableMessageDeletion”: false,
“EnableFileDeletion”: false,
“MessageRetentionDays”: 365,
“FileRetentionDays”: 365,
“DeletionJobStartTime”: “02:00”
},
“MessageExportSettings”: {
“EnableExport”: false,
“ExportFormat”: “actiance”,
“DailyRunTime”: “01:00”,
“ExportFromTimestamp”: 0,
“BatchSize”: 10000,
“GlobalRelaySettings”: {
“CustomerType”: “A9”,
“SmtpUsername”: “”,
“SmtpPassword”: “”,
“EmailAddress”: “”
}
},
“JobSettings”: {
“RunJobs”: true,
“RunScheduler”: true
},
“PluginSettings”: {
“Enable”: true,
“EnableUploads”: false,
“Directory”: “./plugins”,
“ClientDirectory”: “./client/plugins”,
“Plugins”: {},
“PluginStates”: {}
},
“DisplaySettings”: {
“CustomUrlSchemes”: ,
“ExperimentalTimezone”: false
},
“TimezoneSettings”: {
“SupportedTimezonesPath”: “timezones.json”
}
}

and my config.json file websocket is

“ServiceSettings”: {
“WebsocketURL”: “”,
“WebsocketSecurePort”: 443,
“WebsocketPort”: 80,
“AllowCorsFrom”: “*”,
}

so, what should i do if i want to fix it?
and should i hava to set Nginx or IIS?