The formatting of these edit summaries happens in `HtmlPageLinkRendererEndHookHandler`.
The main problem part will be the retrieval/lookup of labels for the formatting (though there might be other parts that fail too?)
The stacktrace shows that the first failure actually happens before the labels are retrieved for formatting, when namespace info is looked up.
Perhaps this lookup is not needed and could just be disabled? (TODO decide).
If not, perhaps product would be okay with this not being linked? or we might need to rethink how linking happens to avoid this API call?
**Example stacktrace:**
```
[5a4d818feea0a039542c4532] /w/index.php?title=Item:Q1&action=history Wikibase\Repo\FederatedProperties\ApiRequestExecutionException from line 49 of /var/www/html/extensions/Wikibase/repo/includes/FederatedProperties/GenericActionApiClient.php:
Backtrace:
#0 /var/www/html/extensions/Wikibase/repo/includes/FederatedProperties/ApiEntityNamespaceInfoLookup.php(53): Wikibase\Repo\FederatedProperties\GenericActionApiClient->get(array)
#1 /var/www/html/extensions/Wikibase/repo/includes/FederatedProperties/ApiEntityNamespaceInfoLookup.php(41): Wikibase\Repo\FederatedProperties\ApiEntityNamespaceInfoLookup->fetchNamespaces()
#2 /var/www/html/extensions/Wikibase/repo/includes/FederatedProperties/ApiEntityTitleTextLookup.php(24): Wikibase\Repo\FederatedProperties\ApiEntityNamespaceInfoLookup->getNamespaceNameForEntityType(string)
#3 /var/www/html/extensions/Wikibase/repo/includes/FederatedProperties/ApiEntityUrlLookup.php(30): Wikibase\Repo\FederatedProperties\ApiEntityTitleTextLookup->getPrefixedText(Wikibase\DataModel\Entity\PropertyId)
#4 /var/www/html/extensions/Wikibase/repo/includes/FederatedProperties/ApiEntityUrlLookup.php(45): Wikibase\Repo\FederatedProperties\ApiEntityUrlLookup->getFullUrl(Wikibase\DataModel\Entity\PropertyId)
#5 /var/www/html/extensions/Wikibase/lib/includes/Store/TypeDispatchingUrlLookup.php(30): Wikibase\Repo\FederatedProperties\ApiEntityUrlLookup->getLinkUrl(Wikibase\DataModel\Entity\PropertyId)
#6 /var/www/html/extensions/Wikibase/repo/includes/Hooks/HtmlPageLinkRendererEndHookHandler.php(260): Wikibase\Lib\Store\TypeDispatchingUrlLookup->getLinkUrl(Wikibase\DataModel\Entity\PropertyId)
#7 /var/www/html/extensions/Wikibase/repo/includes/Hooks/HtmlPageLinkRendererEndHookHandler.php(168): Wikibase\Repo\Hooks\HtmlPageLinkRendererEndHookHandler->doHtmlPageLinkRendererEnd(MediaWiki\Linker\LinkRenderer, Title, HtmlArmor, array, RequestContext, NULL)
#8 /var/www/html/includes/HookContainer/HookContainer.php(320): Wikibase\Repo\Hooks\HtmlPageLinkRendererEndHookHandler::onHtmlPageLinkRendererEnd(MediaWiki\Linker\LinkRenderer, TitleValue, boolean, HtmlArmor, array, NULL)
#9 /var/www/html/includes/HookContainer/HookContainer.php(131): MediaWiki\HookContainer\HookContainer->callLegacyHook(string, array, array, array)
#10 /var/www/html/includes/HookContainer/HookRunner.php(2071): MediaWiki\HookContainer\HookContainer->run(string, array)
#11 /var/www/html/includes/linker/LinkRenderer.php(396): MediaWiki\HookContainer\HookRunner->onHtmlPageLinkRendererEnd(MediaWiki\Linker\LinkRenderer, TitleValue, boolean, HtmlArmor, array, NULL)
#12 /var/www/html/includes/linker/LinkRenderer.php(381): MediaWiki\Linker\LinkRenderer->buildAElement(TitleValue, HtmlArmor, array, boolean)
#13 /var/www/html/includes/linker/LinkRenderer.php(183): MediaWiki\Linker\LinkRenderer->makeBrokenLink(TitleValue, HtmlArmor, array, array)
#14 /var/www/html/includes/Linker.php(126): MediaWiki\Linker\LinkRenderer->makeLink(TitleValue, HtmlArmor, array, array)
#15 /var/www/html/includes/Linker.php(1469): Linker::link(TitleValue, string, array, array, array)
#16 /var/www/html/includes/Linker.php(1416): Linker::makeCommentLink(TitleValue, string, NULL)
#17 [internal function]: Linker::{closure}(array)
#18 /var/www/html/includes/Linker.php(1434): preg_replace_callback(string, Closure, string)
#19 /var/www/html/includes/Linker.php(1209): Linker::formatLinksInComment(string, Title, boolean, NULL)
#20 /var/www/html/includes/Linker.php(1583): Linker::formatComment(string, Title, boolean, NULL)
#21 /var/www/html/includes/Linker.php(1634): Linker::commentBlock(string, Title, boolean, NULL, boolean)
#22 /var/www/html/includes/actions/pagers/HistoryPager.php(432): Linker::revComment(MediaWiki\Revision\RevisionStoreRecord, boolean, boolean, boolean)
#23 /var/www/html/includes/actions/pagers/HistoryPager.php(137): HistoryPager->historyLine(stdClass, stdClass, boolean, boolean, boolean)
#24 /var/www/html/includes/pager/IndexPager.php(588): HistoryPager->formatRow(stdClass)
#25 /var/www/html/includes/actions/HistoryAction.php(305): IndexPager->getBody()
#26 /var/www/html/includes/actions/FormlessAction.php(43): HistoryAction->onView()
#27 /var/www/html/includes/MediaWiki.php(527): FormlessAction->show()
#28 /var/www/html/includes/MediaWiki.php(313): MediaWiki->performAction(Article, Title)
#29 /var/www/html/includes/MediaWiki.php(940): MediaWiki->performRequest()
#30 /var/www/html/includes/MediaWiki.php(543): MediaWiki->main()
#31 /var/www/html/index.php(53): MediaWiki->run()
#32 /var/www/html/index.php(46): wfIndexMain()
#33 {main}
```