Mattermost service can't start

I just follow the link (https://docs.mattermost.com/install/install-rhel-7.html#configuring-tls-on-mattermost-server)to Configure TLS on the Mattermost Server, in order to connect SMTP server. Please refer to below image. Then, I can’t connect Mattermost (http://127.0.0.1:8065/signup_email).
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Below is the content of config.json file:
{
“ServiceSettings”: {
“SiteURL”: “wonderfuldata.com:8341”,
“WebsocketURL”: “”,
“LicenseFileLocation”: “”,
“ListenAddress”: “:8065”,
“ConnectionSecurity”: “None”,
“TLSCertFile”: “”,
“TLSKeyFile”: “”,
“TLSMinVer”: “1.2”,
“TLSStrictTransport”: false,
“TLSStrictTransportMaxAge”: 63072000,
“TLSOverwriteCiphers”: ,
“UseLetsEncrypt”: true,
“LetsEncryptCertificateCacheFile”: “./config/letsencrypt.cache”,
“Forward80To443”: true,
“TrustedProxyIPHeader”: ,
“ReadTimeout”: 300,
“WriteTimeout”: 300,
“IdleTimeout”: 60,
“MaximumLoginAttempts”: 10,
“GoroutineHealthThreshold”: -1,
“GoogleDeveloperKey”: “”,
“EnableOAuthServiceProvider”: false,
“EnableIncomingWebhooks”: true,
“EnableOutgoingWebhooks”: true,
“EnableCommands”: true,
“EnableOnlyAdminIntegrations”: true,
“EnablePostUsernameOverride”: false,
“EnablePostIconOverride”: false,
“EnableLinkPreviews”: true,
“EnableTesting”: false,
“EnableDeveloper”: false,
“EnableOpenTracing”: false,
“EnableSecurityFixAlert”: true,
“EnableInsecureOutgoingConnections”: false,
“AllowedUntrustedInternalConnections”: “”,
“EnableMultifactorAuthentication”: false,
“EnforceMultifactorAuthentication”: false,
“EnableUserAccessTokens”: false,
“AllowCorsFrom”: “”,
“CorsExposedHeaders”: “”,
“CorsAllowCredentials”: false,
“CorsDebug”: false,
“AllowCookiesForSubdomains”: false,
“ExtendSessionLengthWithActivity”: true,
“SessionLengthWebInDays”: 30,
“SessionLengthMobileInDays”: 30,
“SessionLengthSSOInDays”: 30,
“SessionCacheInMinutes”: 10,
“SessionIdleTimeoutInMinutes”: 43200,
“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,
“MinimumHashtagLength”: 3,
“EnableUserTypingMessages”: true,
“EnableChannelViewedMessages”: true,
“EnableUserStatuses”: true,
“ExperimentalEnableAuthenticationTransfer”: true,
“ClusterLogTimeoutMilliseconds”: 2000,
“CloseUnusedDirectMessages”: false,
“EnablePreviewFeatures”: true,
“EnableTutorial”: true,
“ExperimentalEnableDefaultChannelLeaveJoinMessages”: true,
“ExperimentalGroupUnreadChannels”: “disabled”,
“ExperimentalChannelOrganization”: false,
“ExperimentalChannelSidebarOrganization”: “disabled”,
“ExperimentalDataPrefetch”: true,
“ImageProxyType”: “”,
“ImageProxyURL”: “”,
“ImageProxyOptions”: “”,
“EnableAPITeamDeletion”: false,
“ExperimentalEnableHardenedMode”: false,
“DisableLegacyMFA”: true,
“ExperimentalStrictCSRFEnforcement”: false,
“EnableEmailInvitations”: false,
“DisableBotsWhenOwnerIsDeactivated”: true,
“EnableBotAccountCreation”: false,
“EnableSVGs”: false,
“EnableLatex”: false,
“EnableLocalMode”: false,
“LocalModeSocketLocation”: “/var/tmp/mattermost_local.socket”
},
“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”: 1000000,
“EnableConfirmNotificationsToChannel”: true,
“TeammateNameDisplay”: “username”,
“ExperimentalViewArchivedChannels”: false,
“ExperimentalEnableAutomaticReplies”: false,
“ExperimentalHideTownSquareinLHS”: false,
“ExperimentalTownSquareIsReadOnly”: false,
“LockTeammateNameDisplay”: false,
“ExperimentalPrimaryTeam”: “”,
“ExperimentalDefaultChannels”:
},
“ClientRequirements”: {
“AndroidLatestVersion”: “”,
“AndroidMinVersion”: “”,
“DesktopLatestVersion”: “”,
“DesktopMinVersion”: “”,
“IosLatestVersion”: “”,
“IosMinVersion”: “”
},
“SqlSettings”: {
“DriverName”: “mysql”,
“DataSource”: “mmuser:Wonderful1234#@tcp(127.0.0.1:3306)/mattermost?charset=utf8mb4,utf8\u0026readTimeout=30s\u0026writeTimeout=30s”,
“DataSourceReplicas”: ,
“DataSourceSearchReplicas”: ,
“MaxIdleConns”: 20,
“ConnMaxLifetimeMilliseconds”: 3600000,
“MaxOpenConns”: 300,
“Trace”: false,
“AtRestEncryptKey”: “1mg9ew5rz9oswuyh5fmi1zdi8q76zw5j”,
“QueryTimeout”: 30,
“DisableDatabaseSearch”: false
},
“LogSettings”: {
“EnableConsole”: true,
“ConsoleLevel”: “INFO”,
“ConsoleJson”: true,
“EnableFile”: true,
“FileLevel”: “INFO”,
“FileJson”: true,
“FileLocation”: “”,
“EnableWebhookDebugging”: true,
“EnableDiagnostics”: true,
“EnableSentry”: true,
“AdvancedLoggingConfig”: “”
},
“ExperimentalAuditSettings”: {
“SysLogEnabled”: false,
“SysLogIP”: “localhost”,
“SysLogPort”: 6514,
“SysLogTag”: “”,
“SysLogCert”: “”,
“SysLogInsecure”: false,
“SysLogMaxQueueSize”: 1000,
“FileEnabled”: false,
“FileName”: “”,
“FileMaxSizeMB”: 100,
“FileMaxAgeDays”: 0,
“FileMaxBackups”: 0,
“FileCompress”: false,
“FileMaxQueueSize”: 1000
},
“NotificationLogSettings”: {
“EnableConsole”: true,
“ConsoleLevel”: “INFO”,
“ConsoleJson”: true,
“EnableFile”: true,
“FileLevel”: “INFO”,
“FileJson”: true,
“FileLocation”: “”
},
“PasswordSettings”: {
“MinimumLength”: 10,
“Lowercase”: true,
“Number”: true,
“Uppercase”: true,
“Symbol”: true
},
“FileSettings”: {
“EnableFileAttachments”: true,
“EnableMobileUpload”: true,
“EnableMobileDownload”: true,
“MaxFileSize”: 52428800,
“DriverName”: “local”,
“Directory”: “./data/”,
“EnablePublicLink”: false,
“PublicLinkSalt”: “wba31g347jmonoeea96yk3r9mbzmxaca”,
“InitialFont”: “nunito-bold.ttf”,
“AmazonS3AccessKeyId”: “”,
“AmazonS3SecretAccessKey”: “”,
“AmazonS3Bucket”: “”,
“AmazonS3PathPrefix”: “”,
“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”: “No-Reply”,
“FeedbackEmail”: “xx@example.com”,
“ReplyToAddress”: “xx@example.com”,
“FeedbackOrganization”: “”,
“EnableSMTPAuth”: true,
“SMTPUsername”: “xx@example.com”,
“SMTPPassword”: “xxxxx”,
“SMTPServer”: “xx.example.com”,
“SMTPPort”: “25”,
“SMTPServerTimeout”: 10,
“ConnectionSecurity”: “STARTTLS”,
“SendPushNotifications”: true,
“PushNotificationServer”: “https://push-test.mattermost.com”,
“PushNotificationContents”: “full”,
“PushNotificationBuffer”: 1000,
“EnableEmailBatching”: false,
“EmailBatchingBufferSize”: 256,
“EmailBatchingInterval”: 30,
“EnablePreviewModeBanner”: false,
“SkipServerCertificateVerification”: false,
“EmailNotificationContentsType”: “full”,
“LoginButtonColor”: “#0000”,
“LoginButtonBorderColor”: “#2389D7”,
“LoginButtonTextColor”: “#2389D7
},
“RateLimitSettings”: {
“Enable”: false,
“PerSec”: 10,
“MaxBurst”: 100,
“MemoryStoreSize”: 10000,
“VaryByRemoteAddr”: true,
“VaryByUser”: false,