Error in Special:UploadAvatar -- MediaWiki 1.44

[SnowDream39]

Special:上传头像。No configuration.

[093248ecc9dbaff5b38ad7a4] /Special:%E4%B8%8A%E4%BC%A0%E5%A4%B4%E5%83%8F Error: Class "Html" not found

Backtrace:

from /var/www/mediawiki/extensions/Avatar/SpecialUpload.php(42)
#0 /var/www/mediawiki/extensions/Avatar/SpecialUpload.php(36): Avatar\SpecialUpload->displayMessage()
#1 /var/www/mediawiki/includes/specialpage/SpecialPage.php(734): Avatar\SpecialUpload->execute()
#2 /var/www/mediawiki/includes/specialpage/SpecialPageFactory.php(1731): MediaWiki\SpecialPage\SpecialPage->run()
#3 /var/www/mediawiki/includes/actions/ActionEntryPoint.php(499): MediaWiki\SpecialPage\SpecialPageFactory->executePath()
#4 /var/www/mediawiki/includes/actions/ActionEntryPoint.php(143): MediaWiki\Actions\ActionEntryPoint->performRequest()
#5 /var/www/mediawiki/includes/MediaWikiEntryPoint.php(202): MediaWiki\Actions\ActionEntryPoint->execute()
#6 /var/www/mediawiki/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#7 {main}