As reported in https://www.mediawiki.org/wiki/Topic:Rylnpvcpshj9n30s#flow-post-rylnvqsqmjnng558
Special:WhatLinksHere for a template used on a Flow board is getting
Could not find the requested workflow. Return to MediaWiki. [c106cf7f] 2014-07-18 18:24:19: Fatal exception of type Flow\Exception\InvalidInputException
this is the same fatal as bug 68224. I'm having trouble finding either on fluorine.
You can trigger it for a common template if you load enough links, e.g.https://www.mediawiki.org/w/index.php?title=Special:WhatLinksHere/Template:Bug&limit=500 also gets the exception.
Version: master
Severity: critical
URL: https://www.mediawiki.org/wiki/Special:WhatLinksHere/Template:Test123