error on magento 2 after update php 5 to 7, Warning: require(/var/www/html/vendor/magento/framework/registration.php):?

Question

Error on Magento 2 after update from PHP 5 to PHP 7:

Warning: require(/var/www/html/vendor/magento/framework/registration.php): failed to open stream: No such file or directory in /var/www/html/vendor/composer/autoload_real.php on line 60

Fatal error: require(): Failed opening required '/var/www/html/vendor/magento/framework/registration.php' (include_path='/var/www/html/vendor/phpseclib/phpseclib/phpseclib:/var/www/html/vendor/magento/zendframework1/library:/var/www/html/vendor/phpunit/php-file-iterator:/var/www/html/vendor/phpunit/phpunit:/var/www/html/vendor/symfony/yaml:.:/usr/share/php') in /var/www/html/vendor/composer/autoload_real.php on line 60

Any help?

Answer 1

I am facing sem issue I have resolved this by below steps

1. Remove below folders

rm -rf var/page_cache/* var/cache/* var/session/* var/di* var/view_preprocessed/* pub/static/* generated/code/

2. Update composer

composer install

3. Setup upgrade

php bin/magento setup:upgrade

4. Content Deploy

php bin/magento setup:static-content:deploy -f

Answer 2

yes got it, we need to update composer.. i hope it will help some one

Answer 3

rm -rf var/page_cache/* var/cache/* var/session/* var/di* var/view_preprocessed/* pub/static/* var/generation

remove Module which you installed recently view composer composer remove [companyname]/[modulename]

Remember composer update will update all modules installed via composer

Setup upgrade php bin/magento setup:upgrade

Content Deploy php bin/magento setup:static-content:deploy -f it will work perfect

Answer 4

In my case I was just missing credentials for that package in my auth.json