Seem to have quite an odd issue. I've got a custom module that essentially is just a class which extends a Template.

When I install it using composer; it installs the module into the vendor folder. However, when trying to render a block using the class of the custom module - it won't work if the file is in the vendor folder. If I copy the module files into the app/code folder then it runs perfectly.

Any help would be greatly appreciated.

It is just odd because as soon as I drag the file from the vendor folder which is where composer automatically loads the module into


to the app/code folder - it then works perfectly.



Class [Vendor-Name][Module-Name]\Block\Home\View\Home does not exist

I also occasionally get this error:

2 exception(s): Exception #0 (Magento\Framework\Exception\LocalizedException): Invalid block type: Wholesome\Display\Block\Home\View\Home Exception #1 (ReflectionException): Class Wholesome\Display\Block\Home\View\Home does not exist

Template File: vendor/[Vendor-Name][Module-Name]/view/frontend/templates/home/home.phtml

File: vendor/[Vendor-Name][Module-Name]/Block/Home/View/Home.php


use \Magento\Framework\View\Element\Template;

class Home extends Template

 * Core registry
 * @var \Magento\Framework\Registry
protected $_coreRegistry = null;
 * @var \Magento\Framework\App\Http\Context
protected $httpContext;
protected $pageFactory;
protected $brandPage;

public function __construct(
    \Magento\Framework\View\Element\Template\Context $context,
    \Magento\Framework\Registry $registry,
    \Magento\Cms\Model\PageFactory $pageFactory,
    \Magento\Framework\App\Http\Context $httpContext,
    array $data = []
) {
    $this->_coreRegistry = $registry;
    $this->pageFactory = $pageFactory;
    $this->httpContext = $httpContext;
    parent::__construct($context, $data);


File: vendor/[Vendor-Name]/[Theme-Name]/layout/cms_index_index.xml

<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="1column" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
   <referenceContainer name="page.top">
     <block class="[Vendor-Name]\[Module-Name]\Block\Home\View\Home" name="wholesome_home" template="home/home.phtml">
            <argument name="section" xsi:type="string">homepage</argument>
            <argument name="position" xsi:type="number">0</argument>

File: registration.php



    "name": "[vendor-name]/[module-name]",
    "description": "",
    "require": {
        "php": "~5.5.0|~5.6.0|~7.0.0|~7.1.12"
    "type": "magento2-module",
    "version": "1.0.1",
    "license": [
    "autoload": {
        "files": [
  • Please share composer.json and registration.php in question. – Prince Patel May 27 '18 at 6:49

Perhaps when you dragged the module, you should remove it from the setup_module and make bin/magento s:d:c and bin/magento setup:upgrade and bin/magento c:c.

and specify the correct namespace and use. I do not see namespace.

I hope that my answer will bring you closer to the solution.

  • Apologies - I accidentally got rid of the namespace when copy and pasting from the IDE to StackExchange - that shouldn't be the issue. I am not sure what you mean by dragged the module. Ideally I don't have to do any dragging as composer update should load the module into the vendor folder. Thanks – Jerryl15 May 26 '18 at 8:49

It ended up being the composer.json file which in the autoload section was missing the psr-4 element.

"autoload": {
    "files": [
    "psr-4": {
      "[Vendor-Name]\\[Module-Name]\\": ""

I followed this post as i had similar problem. Now module is installed in app/code folder, but when i want to run

sudo php bin/magento setup:upgrade

i get error

Autoload error: Module 'VENDOR_MODULENAME' from '/var/www/html/magento2/sites/magento2_test3/app/code/VENDOR/MODULENAME' has been already defined in '/var/www/html/magento2/sites/magento2_test3/vendor/VENDOR/MODULENAME'

any idea how to solve this ? thanks


@macho can you confirm whether your compose.json / composer.lock file contains the detials about the module which you installed on app/code folder? If so, can you remove that and try again.

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