I found a workaround for Windows OS. Image Adapter try opens to image files ('open function in Gd2.php line 63). validateURLScheme function return false always because it checking 'URL' format but local files not valid for this format, so it returns false.
Find validateURLScheme function in vendor\magento\framework\Image\Adapter\Gd2.php file. at line 96. Replace function with this:
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;
}