PHP GD library true color support broken

TYPO3 Questions Installation
1

I just in stalling the system for frist time. i´m running win10 and XAMPP v3.2.4.
During my first instalation i got this message “PHP GD library true color support broken”

How to solve this problem ?

thanks / Tomas

2

I have installed a older verson of XAMPP that runs on PHP 7.4.13.
Then this error is gone, so i think is related to PHP 8…