When I have installed Magento 2.3 it's working fine. I have added categories, subcategories, products successfully. But Accidentally its showing error as below :
Fatal error: Uncaught Error: Cannot access property ReflectionParameter::$name in F:\xampp\htdocs\magento\vendor\magento\framework\Code\Reader\ClassReader.php:25 Stack trace: #0 F:\xampp\htdocs\magento\vendor\magento\framework\Code\Reader\ClassReader.php(25): ReflectionFunctionAbstract->getParameters() #1 F:\xampp\htdocs\magento\vendor\magento\framework\ObjectManager\Definition\Runtime.php(49): Magento\Framework\Code\Reader\ClassReader->getConstructor('Magento\Framewo...') #2 F:\xampp\htdocs\magento\vendor\magento\framework\ObjectManager\Factory\Dynamic\Developer.php(48): Magento\Framework\ObjectManager\Definition\Runtime->getParameters('Magento\Framewo...') #3 F:\xampp\htdocs\magento\vendor\magento\framework\ObjectManager\ObjectManager.php(70): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magento\Framewo...') #4 F:\xampp\htdocs\magento\vendor\magento\framework\App\ObjectManager\Environment\Developer.php(70): Magento\Framework\ObjectManager\ObjectManager->get('Magento\Framewo...') #5 F:\xampp\ht in F:\xampp\htdocs\magento\vendor\magento\framework\Code\Reader\ClassReader.php on line 25
Please help me what can I do to solve it? PHP version : 7.1.28
Note: I'm new to Magento. Today I have started to learn it.