undefined function imagecreatefrompng() - MediaWiki 1.39.6

[m3w88]

OS: Ubuntu 20.04 PHP 7.4 MediaWiki 1.39.6

LocalSetting.php configuration wfLoadExtension('Avatar'); $wgEnableUploads = true; $wgGroupPermissions[""]["upload"] = true; $wgGroupPermissions[""]["avatarupload"] = true; $wgGroupPermissions["sysop"]["avataradmin"] = true;

Notes:

• I did install the required php-gd dependency

Error: Call to undefined function Avatar\imagecreatefrompng() Backtrace: from /var/www/html/w/extensions/Avatar/Thumbnail.php(20)

0 /var/www/html/w/extensions/Avatar/Thumbnail.php(29): Avatar\Thumbnail->__construct()

1 /var/www/html/w/extensions/Avatar/SpecialUpload.php(53): Avatar\Thumbnail::open()

2 /var/www/html/w/extensions/Avatar/SpecialUpload.php(32): Avatar\SpecialUpload->processUpload()

3 /var/www/html/w/includes/specialpage/SpecialPage.php(701): Avatar\SpecialUpload->execute()

4 /var/www/html/w/includes/specialpage/SpecialPageFactory.php(1428): SpecialPage->run()

5 /var/www/html/w/includes/MediaWiki.php(316): MediaWiki\SpecialPage\SpecialPageFactory->executePath()

6 /var/www/html/w/includes/MediaWiki.php(904): MediaWiki->performRequest()

7 /var/www/html/w/includes/MediaWiki.php(562): MediaWiki->main()

8 /var/www/html/w/index.php(50): MediaWiki->run()

9 /var/www/html/w/index.php(46): wfIndexMain()

10 {main}

[nbdd0121]

Could you share your phpinfo?