@ratsnakegames Never mind, I figured it out how to display them on the page. Now I need to figure out what these error messages mean:

[c9021c4917719257cb3d0c5c] /index.php?title=Sandbox2&action=submit Error: Class "Html" not found

Backtrace:

from /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/extensions/Maps/src/Map/MapHtmlBuilder.php(21)
#0 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/extensions/Maps/src/Map/MapOutputBuilder.php(22): Maps\Map\MapHtmlBuilder->getMapHTML()
#1 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/extensions/Maps/src/Map/MapOutputBuilder.php(13): Maps\Map\MapOutputBuilder->buildMapHtml()
#2 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/extensions/Maps/src/Map/DisplayMap/DisplayMapRenderer.php(61): Maps\Map\MapOutputBuilder->buildOutput()
#3 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/extensions/Maps/src/Map/DisplayMap/DisplayMapFunction.php(64): Maps\Map\DisplayMap\DisplayMapRenderer->renderMap()
#4 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/extensions/Maps/src/ParserHookSetup.php(77): Maps\Map\DisplayMap\DisplayMapFunction->getMapHtmlForKeyValueStrings()
#5 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/extensions/Maps/src/ParserHookSetup.php(58): Maps\ParserHookSetup->handleFunctionHook()
#6 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/parser/Parser.php(3492): Maps\ParserHookSetup->Maps\{closure}()
#7 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/parser/Parser.php(3147): MediaWiki\Parser\Parser->callParserFunction()
#8 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/parser/PPFrame_Hash.php(280): MediaWiki\Parser\Parser->braceSubstitution()
#9 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/parser/Parser.php(2970): MediaWiki\Parser\PPFrame_Hash->expand()
#10 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/parser/Parser.php(1606): MediaWiki\Parser\Parser->replaceVariables()
#11 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/parser/Parser.php(705): MediaWiki\Parser\Parser->internalParse()
#12 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/content/WikitextContentHandler.php(380): MediaWiki\Parser\Parser->parse()
#13 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/content/ContentHandler.php(1692): MediaWiki\Content\WikitextContentHandler->fillParserOutput()
#14 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/content/Renderer/ContentRenderer.php(75): MediaWiki\Content\ContentHandler->getParserOutput()
#15 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/Revision/RenderedRevision.php(260): MediaWiki\Content\Renderer\ContentRenderer->getParserOutput()
#16 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/Revision/RenderedRevision.php(233): MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached()
#17 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/Revision/RevisionRenderer.php(236): MediaWiki\Revision\RenderedRevision->getSlotParserOutput()
#18 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/Revision/RevisionRenderer.php(169): MediaWiki\Revision\RevisionRenderer->combineSlotOutput()
#19 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/Revision/RenderedRevision.php(196): MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}()
#20 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/extensions/TemplateData/includes/Hooks.php(101): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#21 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/HookContainer/HookContainer.php(155): MediaWiki\Extension\TemplateData\Hooks->onMultiContentSave()
#22 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/HookContainer/HookRunner.php(2699): MediaWiki\HookContainer\HookContainer->run()
#23 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/Storage/PageUpdater.php(936): MediaWiki\HookContainer\HookRunner->onMultiContentSave()
#24 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/editpage/EditPage.php(2580): MediaWiki\Storage\PageUpdater->saveRevision()
#25 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/editpage/EditPage.php(1842): MediaWiki\EditPage\EditPage->internalAttemptSave()
#26 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/editpage/EditPage.php(747): MediaWiki\EditPage\EditPage->attemptSave()
#27 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/actions/EditAction.php(68): MediaWiki\EditPage\EditPage->edit()
#28 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/actions/SubmitAction.php(40): MediaWiki\Actions\EditAction->show()
#29 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/actions/ActionEntryPoint.php(728): MediaWiki\Actions\SubmitAction->show()
#30 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/actions/ActionEntryPoint.php(505): MediaWiki\Actions\ActionEntryPoint->performAction()
#31 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/actions/ActionEntryPoint.php(143): MediaWiki\Actions\ActionEntryPoint->performRequest()
#32 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/includes/MediaWikiEntryPoint.php(202): MediaWiki\Actions\ActionEntryPoint->execute()
#33 /srv/data/web/vhosts/wiki.sunkencastles.com/htdocs/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#34 {main}

@juergen_hubert this is a complete shot in the dark but errors like that often result from version incompatibilities, or missing plugins - are you sure all plugins you are using are compatible with your current MediaWiki version?

@ratsnakegames

...now that I've actually found the compatibility lists for the Maps extension, this does look like a rather strong contender. Thanks for pointing that out!

I guess I'll just wait until a new, compatible version of the extension has been released.

Maps/INSTALL.md at master · ProfessionalWiki/Maps

🗺 Maps is the MediaWiki extension that enables visualization of geographic data via dynamic embedded maps. - Maps/INSTALL.md at master · ProfessionalWiki/Maps

GitHub (github.com)

@juergen_hubert @ratsnakegames

Or run MediaWiki 1.43, if that's an option for you?

@ratsnakegames

...now that I've actually found the compatibility lists for the Maps extension, this does look like a rather strong contender. Thanks for pointing that out!

I guess I'll just wait until a new, compatible version of the extension has been released.

Maps/INSTALL.md at master · ProfessionalWiki/Maps

🗺 Maps is the MediaWiki extension that enables visualization of geographic data via dynamic embedded maps. - Maps/INSTALL.md at master · ProfessionalWiki/Maps

GitHub (github.com)

@juergen_hubert @ratsnakegames

Looks like it's been reported and fixed by others testing on MW 1.43.

Error: Class "Html" not found when adding a map · Issue #822 · ProfessionalWiki/Maps

Hello, I installed the extension with composer, the page Special:Version says it's installed but when adding a simple map I get this: Backtrace: from /[path to wiki]/extensions/Maps/src/Map/MapHtmlBuilder.php(21) #0 /[path to wiki]/exten...

GitHub (github.com)

@krinkle @juergen_hubert Their policy seems to be to only support LTS releases of MediaWiki, so official support for 1.44 is unlikely.

@krinkle @juergen_hubert Their policy seems to be to only support LTS releases of MediaWiki, so official support for 1.44 is unlikely.

@ratsnakegames @juergen_hubert

This particular issue was fixed so if you install it from Git, it might work.

@krinkle @juergen_hubert I do not see any commit that looks like it might have fixed it in the git history, and the ticket you shared was closed by the reporter after they were told the issue would not be fixed and they should stick to the LTS version. So no, I don't think it is fixed on the git main branch and I don't think running some random wip commit from Github in production is a good idea anyway.

@krinkle @juergen_hubert It does seem like version 12.0.0 lists "partial" 1.44 compatibility in its readme, whatever that means.

@ratsnakegames @krinkle

...huh. I just realized that the official instructions for installing Maps, which I used, only install version 10.1:

COMPOSER=composer.local.json composer require --no-update mediawiki/maps:~10.1

Perhaps it will work if I substitute "10.1" for "12.0".

Installation - Maps for MediaWiki

(maps.extension.wiki)

@ratsnakegames @krinkle

Okay, I tried it again - with Maps 12.0 this time.

It doesn't create an error, which is progress. But while it displays a map box in the correct size, the map is stuck at "Loading map..."

Sandbox2

Sunken Castles, Evil Poodles Wiki (wiki.sunkencastles.com)

EDIT: Huh, now it loads. Presumably, it took a while until the leaflet API recognized my site...