phpoffice/phpspreadsheet 1.17.1 requires ext-gd * -> it is missing from your system. Install or enable PHP's gd extension.

This is with PHP 7.4

Your requirements could not be resolved to an installable set of packages.

Problem 1
- phpoffice/phpspreadsheet is locked to version 1.17.1 and an update of this package was not requested.
- phpoffice/phpspreadsheet 1.17.1 requires ext-gd * -> it is missing from your system. Install or enable PHP's gd extension.

The problem is I enable gd2, and it still doesn't work. Why does it ask for an non-existing gd extension?

I don't know how to fix it, please help !