title: Cannot install module mymodule. Unfortunately, the module did not return additional details
body: <p>I am new in Prestashop module development.
  I am trying to build amy first prestashop module[ref: <a href="http://doc.prestashop.com/display/PS16/Creating+a+first+module]" rel="nofollow noreferrer">http://doc.prestashop.com/display/PS16/Creating+a+first+module]</a>.
  Here is my code</p>
  
  <pre><code>&lt;?php
      if(!defined('_PS_VERSION_'))
          exit();
      class MyModule extends Module
      {
          public function _construct()
          {
              $this-&gt;name = 'mymodule';
              $this-&gt;tab = 'front_office_features';
              $this-&gt;version = '1.0.0';
              $this-&gt;author = 'Rohit Prakash';
              $this-&gt;need_instance = 0;
              $this-&gt;ps_versions_compliancy = array('min' =&gt; '1.6', 'max' =&gt; _PS_VERSION_); 
              $this-&gt;bootstrap = true;
  
              parent::__construct();
  
              $this-&gt;displayName = $this-&gt;l('My module');
              $this-&gt;description = $this-&gt;l('Description of my module.');
  
              $this-&gt;confirmUninstall = $this-&gt;l('Are you sure you want to uninstall?');
  
              if (!Configuration::get('MYMODULE_NAME'))      
                $this-&gt;warning = $this-&gt;l('No name provided');
          }
  
          public function install()
          {
            if (!parent::install())
              return false;
            return true;
          }
  
          public function uninstall()
          {
            if (!parent::uninstall())
              return false;
            return true;
          }
      }
  </code></pre>
  
  <p>when I am trying to install mymodule from back office then got an error message</p>
  
  <p>"Error!
  Cannot install module mymodule. Unfortunately, the module did not return additional details."</p>
  
  <p>help me please!!</p>