My Node JS API, which uses a Child process, works when run by nodemon, cmd but in PM2 generates error

Question

My API runs a python script through an Express route, using Child process, I have tried to run only the script using python nameScript and it worked, I do not know why is giving this Python ENOENT error. Part of the code in Node JS:

    app.post('/python', chamandoPython)

    async function chamandoPython(req, res) {
      var process = spawn('python', ["./PythonServices/main.py", 
       "./uploads/"]).on('error', function( err ){ throw err })
      process.stdout.on('data', async function (data) {
        await res.send(data.toString())
      })
      process.stderr.on('data', async function (data) {
        console.log("stderr" + data.toString())
      })
     }

When I run this file by nodemon, it works perfectly, but when "starto" it by PM2, returns this error:

    $Error: spawn python ENOENT
    $  at Process.ChildProcess._handle.onexit (internal/child_process.js:268:19)
    $  at onErrorNT (internal/child_process.js:470:16)
    $  at processTicksAndRejections (internal/process/task_queues.js:84:21) {
    $errno: 'ENOENT',
    $code: 'ENOENT',
    $syscall: 'spawn python',
    $path: 'python',
    $spawnargs: [ './PythonServices/main.py', './uploads/' ]
    $}

I am trying to put my API on a server, the code on my machine works for both nodemon/Node and PM2 but on the server, it only works when it runs on nodemon/Node. The same code generates this error only when running on PM2.