Error : couldn't connect to server 127.0.0.1:27017, connection attempt failed : Socket Exception

Ops and Admin
5

This is the content of my mongod.conf file :

# mongod.conf

# for documentation of all options, see:
#   http://docs.mongodb.org/manual/reference/configuration-options/

# Where and how to store data.
storage:
  dbPath: /var/lib/mongodb
  journal:
    enabled: true
#  engine:
#  mmapv1:
#  wiredTiger:

# where to write logging data.
systemLog:
  destination: file
  logAppend: true
  path: /var/log/mongodb/mongod.log

# network interfaces
net:
  port: 27017
  bindIp: 127.0.0.1
  tls :
       mode : requireTLS
       certificateKeyFile : /home/youssef/mongodb.pem
       CAFile : /home/youssef/rootCA.pem

# how the process runs
processManagement:
  timeZoneInfo: /usr/share/zoneinfo

#security:

#operationProfiling:

#replication:

#sharding:

## Enterprise-Only Options:

#auditLog:

#snmp:

Thank you for your time