upgrading from magento2.2.5 to 2.3.5 I'm facing this issue

Question

I'm upgrading from magento2.2.5 to 2.3.5 I'm facing this issue

PHP Fatal error:  Uncaught Error: Class 'Magento\Framework\Component\ComponentRegistrar' not found in app/code/<Vendor>/<ModuleName>/registration.php file


<?php
 \Magento\Framework\Component\ComponentRegistrar::register(
     \Magento\Framework\Component\ComponentRegistrar::MODULE,
     'Vendor_Module',
     __DIR__
 );

can anyone please help me.

Answer 1

there is an issue with one of your module that does not have proper code in registration.php file and it does not have this class Magento\Framework\Component\ComponentRegistrar either delete the module or update the code of of your registration.php file in your module

Answer 2

This should be the composer version-related issue

Try after update composer version

composer self-update --2