luos/workflow/engine/methods/setup/clearCompiledAjax.php

<?php
try {
  if (isset($_POST['javascriptCache']) || isset($_POST['metadataCache']) || isset($_POST['htmlCache'])) {
    
    if (isset($_POST['javascriptCache'])) {
      G::rm_dir(PATH_C . 'ExtJs');
      $response->javascript = true;
    }

    if (isset($_POST['metadataCache'])) {
      G::rm_dir(PATH_C . 'xmlform');
      $response->xmlform = true;
    }

    if (isset($_POST['htmlCache'])) {
      G::rm_dir(PATH_C . 'smarty');
      $response->smarty = true;
    }
    
    $response->success = true;
  }
  else{
    $response->success = false;
  }
}
catch (Exception $e) {
  $response->success = false;
  $response->message = $e->getMessage();
}
echo G::json_encode($response);