This is Magento bug. Wrong paths to Windows are generated. The fixed fix is

Magento 2.3.0 – 2.3.3

#/vendor/magento/framework/View/Element/Template/File/Validator.php:140
the string

if (0 === strpos($realPath, $directory)) {
return true;
}
to replace

$realDirectory = $this->fileDriver->getRealPath($directory);
if ($realDirectory && 0 === strpos($realPath, $realDirectory)) {
return true;
}