Mattermost service stopped

[root@teamserver ~]# sudo -u mattermost /opt/mattermost/bin/mattermost
Error: failed to load configuration: failed to create store: unable to load on s tore creation: parsing error at line 1, character 13870: invalid character ‘,’ a fter top-level value
Usage:
mattermost [flags]
mattermost [command]

Available Commands:
channel Management of channels
command Management of slash commands
config Configuration
export Export data from Mattermost
group Management of groups
help Help about any command
import Import data.
integrity Check database data integrity
jobserver Start the Mattermost job server
ldap LDAP related utilities
license Licensing commands
logs Display logs in a human-readable format
permissions Management of the Permissions system
plugin Management of plugins
reset Reset the database to initial state
roles Management of user roles
sampledata Generate sample data
server Run the Mattermost server
team Management of teams
user Management of users
version Display version information
webhook Management of webhooks

Flags:
-c, --config string Configuration file to use.
–disableconfigwatch When set config.json will not be loaded from disk w hen the file is changed.
-h, --help help for mattermost

Use “mattermost [command] --help” for more information about a command.

[root@teamserver ~]# sudo -u mattermost /opt/mattermost/bin/mattermost config va lidate
Error: failed to initialize config store: failed to create store: unable to load on store creation: parsing error at line 1, character 13870: invalid character ‘,’ after top-level value
Usage:
mattermost config validate [flags]

Flags:
-h, --help help for validate

Global Flags:
-c, --config string Configuration file to use.
–disableconfigwatch When set config.json will not be loaded from disk w hen the file is changed.

[root@teamserver ~]# ls -l /opt/mattermost/config/config.json
-rw-r–r-- 1 mattermost mattermost 18820 Jan 21 06:51 /opt/mattermost/config/config.json