Failed to enable unit: Invalid argument systemctl enable .service

I have made a startup_test.sh with the following contents

cd /home/xyz/Desktop/gnome-terminal -e "bash -c ./efg"

#desktop folder contains an executable named efg.

If I run gnome-terminal -e "bash -c ./efg" in terminal it just works fine. Opens a new terminal and program efg is running correctly.I want to make this script startup_test.sh run after bootup/login.

I am in a login which has root privileges.

chmod +x startup_test.shcp startup_test.sh /usr/sbin/

My startup_test.service has the following contents:

[Unit]Description=ABC[Install]WantedBy=multi-user.target[Service]ExecStart=/usr/sbin/startup_test.shWorkingDirectory=/home/xyz/Desktop/startupStandardOutput=syslogStandardError=syslogSyslogIdentifier=%n

startup_test.service is placed in /etc/systemd/system folder.

Now the command

systemctl daemon-reload

is run.No output.

Now the command systemctl enable startup_test.service is giving the following output:

Failed to enable unit : Invalid argument

What is the cause of the above output.

the command systemctl start startup_test.service is giving no output.

The command systemctl status startup_test.service is giving:

startup_test.service - ABC   Loaded: loaded (/etc/systemd/system/startup_test.service; disabled; vendor preset: disabled)   Active: failed (Result: exit-code) since Mon 2024-02-19 12:09:20 IST; 2min 55s ago  Process: 32531 ExecStart=/usr/sbin/startup_test.sh (code=exited, status=203/EXEC) Main PID: 32531 (code=exited, status=203/EXEC)Feb 19 12:09:20 localhost.localdomain systemd[1]: Started ABC.Feb 19 12:09:20 localhost.localdomain systemd[1]: startup_test.service: Main process exited, code=exited, status=203/EXECFeb 19 12:09:20 localhost.localdomain systemd[1]: startup_test.service: Failed with result 'exit-code'.

OS is redhat 8.2