Fatal error: Uncaught ReflectionException: Class Magento\Framework\App\ResourceConnection\Proxy does not exist in /opt/lampp/htdocs/magento/vendor/magento/framework/Code/Reader/ClassReader.php:26 Stack trace: code example

Example: Class Magento\Framework\App\ResourceConnection\Proxy does not exist

sudo chmod 777 -R .
sudo chown www-data: -R .
rm -rf var/cache/* var/page_cache/* var/generation/*
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