I have been trying to install Promtail on a RHEL 6 server and keep getting this error

Error: caller=main.go:115 msg="error creating promtail" error="at least one client config should be provided"

It seems to be requesting for the config file which has been passed CONFIG_FILE=/usr/local/bin/promtailconf.yml

I have done this deployment a number of times on RHEL 8 without a hitch not sure what i am getting wrong

#cat /etc/init.d/promtail
#! /bin/bash
# chkconfig: 345 20 80
# description: my service
345 - 3,4,5 runlevels
20 - start priority
80- stop prioroty
RETVAL=0
PROG="promtail"
EXEC=/usr/local/bin/promtail
LOCKFILE="/var/lock/subsys/$PROG"
LOGFILE=/var/log/promtail.log
DATADIR=/usr/local/bin/promtail/data
CONFIG_FILE=/usr/local/bin/promtailconf.yml
ErrLOGFILE=/var/log/promtail_error.log

# Source function library.
if [ -f /etc/rc.d/init.d/functions ]; then
  . /etc/rc.d/init.d/functions
else
  echo "/etc/rc.d/init.d/functions is not exists"
  exit 0
fi
start() {
  if [ -f $LOCKFILE ]
  then
    echo "$PROG is already running!"
  else
    echo -n "Starting $PROG: "
    nohup $EXEC $OPTIONS > $LOGFILE 2> $ErrLOGFILE &
    RETVAL=$?
    [ $RETVAL -eq 0 ] && touch $LOCKFILE && success || failure
    echo
    return $RETVAL
  fi
}
stop() {
  echo -n "Stopping $PROG: "
  killproc $EXEC
  RETVAL=$?
  [ $RETVAL -eq 0 ] && rm -r $LOCKFILE && success || failure

config file cat /usr/local/bin/promtailconf.yml

server:
  http_listen_port: 9080
  grpc_listen_port: 0

positions:
  filename: /tmp/positions.yaml

clients:
  - url: http://xxx.xxx.xxx.xxx:3100/loki/api/v1/push

scrape_configs:
- job_name: system
  static_configs:
  - targets:
      - localhost
    labels:
      job: varlogs
      __path__: /var/log/*log