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1. Check if traq works on windows or not. If it works Please remove following check from install.php and upgrade.php 
if($globals['softpanel'] == 'ampps'){
		$error[] = 'Traq cannot be upgraded on '.$globals['softpanel'];	
}

(Above condition has been removed from version 3.0.9)

2. PHP REQUIREMENT LINK : https://traq.io/downloads And in readme.md

3. We have restricted script on PHP 8.0 due to syntax error while manual installation . Remove when resolved by vendor.