https://es.wikiquote.org/wiki/Tema:Sobaaiky57zs7py7
The second most common Flow exception in production right now (behind the T107204 ones) is:
61 Flow\Exception\CrossWikiException from line 240 of /srv/mediawiki/php-1.26wmf23/extensions/Flow/includes/Model/Workflow.php: Interwiki to 'mediawikiwiki' from 'eswikiquote' not implemented
The exceptions all seem to have the same URL and the same backtrace, suggesting there's a single corrupt topic on Spanish Wikiquote:
2015-09-21 09:17:16 mw1088 eswikiquote exception ERROR: [a41c004f] /wiki/Tema:Sobaaiky57zs7py7 Flow\Exception\CrossWikiException from line 240 of /srv/mediawiki/php-1.26wmf23/extensions/Flow/includes/Model/Workflow.php: Interwiki to 'mediawikiwiki' from 'eswikiquote' not implemented {"exception_id":"a41c004f"} [Exception Flow\Exception\CrossWikiException] (/srv/mediawiki/php-1.26wmf23/extensions/Flow/includes/Model/Workflow.php:240) Interwiki to 'mediawikiwiki' from 'eswikiquote' not implemented #0 /srv/mediawiki/php-1.26wmf23/extensions/Flow/includes/Model/Workflow.php(224): Flow\Model\Workflow::getFromTitleCache(string, integer, string) #1 /srv/mediawiki/php-1.26wmf23/extensions/Flow/Hooks.php(1313): Flow\Model\Workflow->getOwnerTitle() #2 /srv/mediawiki/php-1.26wmf23/includes/Hooks.php(204): FlowHooks::onTitleSquidURLs(Title, array) #3 /srv/mediawiki/php-1.26wmf23/includes/Title.php(3578): Hooks::run(string, array) #4 /srv/mediawiki/php-1.26wmf23/includes/MediaWiki.php(452): Title->getSquidURLs() #5 /srv/mediawiki/php-1.26wmf23/includes/MediaWiki.php(255): MediaWiki->performAction(Article, Title) #6 /srv/mediawiki/php-1.26wmf23/includes/MediaWiki.php(682): MediaWiki->performRequest() #7 /srv/mediawiki/php-1.26wmf23/includes/MediaWiki.php(476): MediaWiki->main() #8 /srv/mediawiki/php-1.26wmf23/index.php(41): MediaWiki->run() #9 /srv/mediawiki/w/index.php(3): include(string) #10 {main}