Warning: DOMDocument::schemaValidate(): Invalid Schema in C:\Bitnami\wampstack-7.1.25-0\apache2\htdocs\vendor\magento\framework\Config\Dom.php on line 316

Fatal error: Uncaught Magento\Framework\Exception\LocalizedException: Invalid Document simple type 'phpClassName', attribute 'base': The QName value '{http://www.w3.org/2001/XMLSchema}string' does not resolve to a(n) simple type definition. Line: 36 attribute decl. 'name', attribute 'type': The QName value '{http://www.w3.org/2001/XMLSchema}string' does not resolve to a(n) simple type definition. Line: 163 in C:\Bitnami\wampstack-7.1.25-0\apache2\htdocs\vendor\magento\framework\Config\Reader\Filesystem.php:163 Stack trace: #0 C:\Bitnami\wampstack-7.1.25-0\apache2\htdocs\vendor\magento\framework\Config\Reader\Filesystem.php(130): Magento\Framework\Config\Reader\Filesystem->_readFiles(Object(Magento\Framework\Config\FileIterator)) #1 C:\Bitnami\wampstack-7.1.25-0\apache2\htdocs\vendor\magento\framework\App\ObjectManagerFactory.php(275): Magento\Framework\Config\Reader\Filesystem->read('primary') #2 C:\Bitnami\wampstack-7.1.25-0\apache2\htdocs\vendor\magento\framework\App\ObjectManagerFactory.php(136): Magento\Framework\A in C:\Bitnami\wampstack-7.1.25-0\apache2\htdocs\vendor\magento\framework\App\ObjectManagerFactory.php on line 277