1. Need to update code in Validator.php
2. Path: vendor\magento\framework\View\Element\Template\File
3. Replace line no 138 like below

$realPath = $this->fileDriver->getRealPath($path); replace with $realPath = str_replace('\\', '/', $this->fileDriver->getRealPath($path));

Run below commends.
php bin/magento setup:upgrade
php bin/magento setup:static-content:deploy -f
php bin/magento cache:clean
php bin/magento cache:flush
php bin/magento indexer:reindex

Add extra condition, please edit below function on line no 90 follow this- vendor\magento\framework\Image\Adapter\Gd2.php

private function validateURLScheme(string $filename) : bool
  {
      $allowed_schemes = ['ftp', 'ftps', 'http', 'https'];
      $url = parse_url($filename);
      if ($url && isset($url['scheme']) && !in_array($url['scheme'], $allowed_schemes) && !file_exists($filename)) {
          return false;
      }

      return true;
  }