Error: Class "Html" not found

[musinsky]

• MediaWiki 1.44.0
• PHP 8.4.11 (fpm-fcgi)
• ExternalContent 3.0.1 (installed via composer)

{{#embed:https://raw.githubusercontent.com/ProfessionalWiki/ExternalContent/refs/heads/master/README.md}} => OK
{{#embed:https://raw.githubusercontent.com/ProfessionalWiki/ExternalContent/refs/heads/master/composer.json}} => Error: Class "Html" not found

[aKM_wNDbDRxWMPWK49onugAAAEA] /mediawiki/index.php?title=Tmp&action=submit Error: Class "Html" not found

Backtrace:

from /opt/mediawiki-1.44.0/extensions/ExternalContent/src/Domain/ContentRenderer/CodeRenderer.php(21)
#0 /opt/mediawiki-1.44.0/extensions/ExternalContent/src/UseCases/Embed/EmbedUseCase.php(67): ProfessionalWiki\ExternalContent\Domain\ContentRenderer\CodeRenderer->render()
#1 /opt/mediawiki-1.44.0/extensions/ExternalContent/src/EntryPoints/EmbedFunction.php(31): ProfessionalWiki\ExternalContent\UseCases\Embed\EmbedUseCase->embed()
#2 /opt/mediawiki-1.44.0/extensions/ExternalContent/src/EntryPoints/MediaWikiHooks.php(23): ProfessionalWiki\ExternalContent\EntryPoints\EmbedFunction->handleParserFunctionCall()
#3 /opt/mediawiki-1.44.0/includes/parser/Parser.php(3492): ProfessionalWiki\ExternalContent\EntryPoints\MediaWikiHooks::{closure:ProfessionalWiki\ExternalContent\EntryPoints\MediaWikiHooks::onParserFirstCallInit():22}()
#4 /opt/mediawiki-1.44.0/includes/parser/Parser.php(3147): MediaWiki\Parser\Parser->callParserFunction()
#5 /opt/mediawiki-1.44.0/includes/parser/PPFrame_Hash.php(280): MediaWiki\Parser\Parser->braceSubstitution()
#6 /opt/mediawiki-1.44.0/includes/parser/Parser.php(2970): MediaWiki\Parser\PPFrame_Hash->expand()
#7 /opt/mediawiki-1.44.0/includes/parser/Parser.php(1606): MediaWiki\Parser\Parser->replaceVariables()
#8 /opt/mediawiki-1.44.0/includes/parser/Parser.php(705): MediaWiki\Parser\Parser->internalParse()
#9 /opt/mediawiki-1.44.0/includes/content/WikitextContentHandler.php(380): MediaWiki\Parser\Parser->parse()
#10 /opt/mediawiki-1.44.0/includes/content/ContentHandler.php(1692): MediaWiki\Content\WikitextContentHandler->fillParserOutput()
#11 /opt/mediawiki-1.44.0/includes/content/Renderer/ContentRenderer.php(75): MediaWiki\Content\ContentHandler->getParserOutput()
#12 /opt/mediawiki-1.44.0/includes/editpage/EditPage.php(4312): MediaWiki\Content\Renderer\ContentRenderer->getParserOutput()
#13 /opt/mediawiki-1.44.0/includes/editpage/EditPage.php(4215): MediaWiki\EditPage\EditPage->doPreviewParse()
#14 /opt/mediawiki-1.44.0/includes/editpage/EditPage.php(3048): MediaWiki\EditPage\EditPage->getPreviewText()
#15 /opt/mediawiki-1.44.0/includes/editpage/EditPage.php(801): MediaWiki\EditPage\EditPage->showEditForm()
#16 /opt/mediawiki-1.44.0/includes/actions/EditAction.php(68): MediaWiki\EditPage\EditPage->edit()
#17 /opt/mediawiki-1.44.0/includes/actions/SubmitAction.php(40): MediaWiki\Actions\EditAction->show()
#18 /opt/mediawiki-1.44.0/includes/actions/ActionEntryPoint.php(728): MediaWiki\Actions\SubmitAction->show()
#19 /opt/mediawiki-1.44.0/includes/actions/ActionEntryPoint.php(505): MediaWiki\Actions\ActionEntryPoint->performAction()
#20 /opt/mediawiki-1.44.0/includes/actions/ActionEntryPoint.php(143): MediaWiki\Actions\ActionEntryPoint->performRequest()
#21 /opt/mediawiki-1.44.0/includes/MediaWikiEntryPoint.php(202): MediaWiki\Actions\ActionEntryPoint->execute()
#22 /opt/mediawiki-1.44.0/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#23 {main}

[JeroenDeDauw]

Yeah, not compatible with MW 44 yet. IMO you are best off sticking with MW 43, which is an LTS, and does not have all the compatibility problems of 44. Unless there is something in 44 you really need, which I very much doubt.

[musinsky]

To same problem with MediaWiki 1.45.0

[JeroenDeDauw]

https://www.entropywins.wtf/blog/2025/08/20/why-you-should-use-mediawiki-lts-versions/

[jxs2151]

I noticed that the Release Notes for 3.0.1 states: "Fixed compatibility with MediaWiki 1.43 and above (IDatabase TypeError)".

Is that only a fix for that particular issue, or does that cover the issue noted on this issue?