Reported by @Florian at T75148#1535145 .
https://www.mediawiki.org/wiki/Project:Support_desk
{F1469918}
Error:
```
2015-08-13 14:47:46 mw1252 mediawikiwiki exception ERROR: [8a10dd43] /wiki/Project:Support_desk Flow\Exception\InvalidDataException from line 45 of /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Collection/PostCollection.php: No TopicListEntry founds for topic id s52bxzn9rgi3j9e0 {"exception":"[Exception Flow\\Exception\\InvalidDataException] (/srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Collection/PostCollection.php:45) No TopicListEntry founds for topic id s52bxzn9rgi3j9e0
[stacktrace]
#0 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Collection/AbstractCollection.php(240): Flow\\Collection\\PostCollection->getBoardWorkflowId()
#1 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/RevisionActionPermissions.php(76): Flow\\Collection\\AbstractCollection->getBoardWorkflow()
#2 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Templating.php(131): Flow\\RevisionActionPermissions->isAllowed(Flow\\Model\\PostRevision, string)
#3 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Formatter/TocTopicListFormatter.php(67): Flow\\Templating->getContent(Flow\\Model\\PostRevision, string)
#4 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Block/TopicList.php(289): Flow\\Formatter\\TocTopicListFormatter->formatApi(Flow\\Model\\Workflow, array, array, Flow\\Data\\Pager\\PagerPage)
#5 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Block/TopicList.php(231): Flow\\Block\\TopicListBlock->renderApi(array)
#6 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/View.php(192): Flow\\Block\\TopicListBlock->renderTocApi(array, array)
#7 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/View.php(69): Flow\\View->buildApiResponse(Flow\\WorkflowLoader, array, string, array)
#8 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Actions/Action.php(101): Flow\\View->show(Flow\\WorkflowLoader, string)
#9 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Actions/ViewAction.php(16): Flow\\Actions\\FlowAction->showForAction(string, OutputPage)
#10 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Actions/Action.php(46): Flow\\Actions\\ViewAction->showForAction(string)
#11 /srv/mediawiki/php-1.26wmf18/includes/MediaWiki.php(456): Flow\\Actions\\FlowAction->show()
#12 /srv/mediawiki/php-1.26wmf18/includes/MediaWiki.php(255): MediaWiki->performAction(Article, Title)
#13 /srv/mediawiki/php-1.26wmf18/includes/MediaWiki.php(677): MediaWiki->performRequest()
#14 /srv/mediawiki/php-1.26wmf18/includes/MediaWiki.php(474): MediaWiki->main()
#15 /srv/mediawiki/php-1.26wmf18/index.php(41): MediaWiki->run()
#16 /srv/mediawiki/w/index.php(3): include(string)
#17 {main}
"}
```