bash script Syntax error: word unexpected (expecting "do") - bash

Question

I'm trying to run this dropbox script on my nginx server , but im getting:
Syntax error: word unexpected (expecting "do")
I copy pasted the script for a website, and I tried removing special characters, but im still getting the same error.
script:
#!/bin/sh
# /etc/init.d/dropbox
### BEGIN INIT INFO
# Provides: dropbox
# Required-Start: $network $syslog $remote_fs
# Required-Stop: $network $syslog $remote_fs
# Should-Start: $named $time
# Should-Stop: $named $time
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start and stop the dropbox daemon for debian/ubuntu
# Description: Dropbox daemon for linux
### END INIT INFO
DROPBOX_USERS="root"
start() {
echo "Starting dropbox..."
for dbuser in $DROPBOX_USERS; do
start-stop-daemon -b -o -c $dbuser -S -x /home/$dbuser/.dropbox-dist/dropboxd
done
}
stop() {
echo "Stopping dropbox..."
for dbuser in $DROPBOX_USERS; do
start-stop-daemon -o -c $dbuser -K -x /home/$dbuser/.dropbox-dist/dropboxd
done
}
status() {
for dbuser in $DROPBOX_USERS; do
dbpid=`pgrep -u $dbuser dropbox`
if [ -z $dbpid ] ; then
echo "dropboxd for USER $dbuser: not running."
else
echo "dropboxd for USER $dbuser: running."
fi
done
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart|reload|force-reload)
stop
start
;;
status)
status
;;
*)
echo "Usage: /etc/init.d/dropbox {start|stop|reload|force-reload|restart|status}"
exit 1
esac
exit 0

Answer 1

Probably you managed to insert windows line endings when you copy and pasted. If you have dos2unix, use it. (dos2unix scriptfile) Otherwise, there are a number of similar utilities.

Answer 2

Why do you have
/home/$dbuser/.dropbox-dist/dropboxd
or replacing variables.
/home/root/.dropbox-dist/dropboxd
Shouldn't it be
/root/.dropbox-dist/dropboxd
eg
/$dbuser/.dropbox-dist/dropboxd
Are you seriously allowing dropboxes in /root ?
Also why a for dbuser in DROPBOX_USERS; do reassign? rather than
dbuser=$DROPBOX_USERS