Magento 2 : Error 500 after installing

Question

[Ubuntu 18.04 / Apache 2.4 / PHP 7.2.17 / Magento 2.3.1]

After successful installing, magento show blank page. I found following error in apache error.log:

[php7:error] [pid 29252] [client 127.0.0.1:45454] PHP Fatal error: Uncaught RuntimeException: Can't create directory /var/www/html/magento/generated/code/Magento/Framework/App/ResourceConnection/.\nClass Magento\Framework\App\ResourceConnection\Proxy generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. in /var/www/html/magento/vendor/magento/framework/Code/Generator.php:135\nStack trace:\n#0 /var/www/html/magento/vendor/magento/framework/Code/Generator/Autoloader.php(35): Magento\Framework\Code\Generator->generateClass('Magento\\Framewo...')\n#1 [internal function]: Magento\Framework\Code\Generator\Autoloader->load('Magento\\Framewo...')\n#2 [internal function]: spl_autoload_call('Magento\\Framewo...')\n#3 /var/www/html/magento/vendor/mag in /var/www/html/magento/vendor/magento/framework/Code/Generator.php on line 135

I have set chmod -R 777 /var/www/html/magento/generated. But it's showing the same error. Can you help?

Answer 1

You have to give permissions to var pub and generated directories. cd into your magento installation and run following command;

chmod -R 777 var pub generated

you may also need to run setup upgarade and deploy static files so run following commands too ;

php bin/magento s:up && php bin/magento s:s:d -f && chmod 777 -R var pub generated

• mashuxa: Thank you very much. But now I have new error: There has been an error processing your request /var/www/html/magento/var/report {"0":"SQLSTATE[HY000] [1698] Access denied for user 'root'@'localhost'","1":"<pre>#1 Zend_Db_Adapter_Pdo_Mysql->_connect() called at [vendor\/magento\/framework\/DB\/Adapter\/Pdo\/Mysql.php:406]\n#2 Magento\\Framework\\DB\\Adapter\\Pdo\\Mysql->_connect() called at [vendor\/magento\/zendframework1\/library\/Zend\/Db\/Adapter\/Abstract.php:460]\n#3 Zend_Db_Adapter_Abstract->query('SELECT `store_we...', array()) called at...
• Vivek Kumar: you may not have connected to your db correctly. Enter your db user credentials and correct db in {magento_root}/app/etc/env.php
• Vivek Kumar: Also please accept the answer if it helped
• mashuxa: Thank you very much. It works. Also problem was related with root user's password. I created new user with strong password and magento started!