While running Magento 2.x & displaying Invalid template file error as below
exception(s):
Exception #0 (Magento\Framework\Exception\ValidatorException): Invalid template file: 'C:/xampp/htdocs/magento2/vendor/magento/module-theme/view/frontend/templates/page/js/require_js.phtml' in module: '' block's n
Solution: There are following below steps need to follow
[1] – Find validateURLScheme function in below Path vendor\magento\framework\Image\Adapter\Gd2.php file. at line 96
[2] – Replace function with this: !file_exists($filename)
private function validateURLScheme(string $filename) : bool
{
if(!file_exists($filename)) { // if file not exist
$allowed_schemes = ['ftp', 'ftps', 'http', 'https'];
$url = parse_url($filename);
if ($url && isset($url['scheme']) && !in_array($url['scheme'], $allowed_schemes)) {
return false;
}
}
return true;
}[3] – Finally Magento 2.x Invalid template issue will be resolved & site will be run properly.