Minecraft server (aws/linux) discord webhook error

I have a Minecraft server running on an EC2 Instance (AWS), which runs a Linux (CentOS). I altered the minecraft.service system process to

-ini
ExecStart=python3 run_server.py

This python script pulls a run.json file, which fills in server jar name, webhook URL, role ID, and jvm args. This is what it looks like:

-json
{
  "server_jar":"server.jar",
  "jvm_args":"-Xms1G -Xmx4G",
  "webhook_url":"your_url_here",
  "role_id":"your_role_here"
}

When I run sudo systemctl start minecraft followed by sudo systemctl status minecraft I get this error:

with Popen(*popenargs, **kwargs) as p:  
     ^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "/usr/local/lib/python3.12/subprocess.py", line 1026, in __init__
 self._execute_child(args, executable, preexec_fn, close_fds,  
File "/usr/local/lib/python3.12/subprocess.py", line 1953, in _execute_child
 raise child_exception_type(errno_num, err_msg, err_filename)  
FileNotFoundError: [Errno 2] No such file or directory: 'java -Xmx3G -Xms3G -jar server.jar nogui'