Board Thread:General Discussion/@comment-103.8.194.84-20151019093953/@comment-6881629-20151019112258

The Companions sometimes stop giving quests after Proving Honor for that fast traveling to Whiterun stables then walking back to Jorrvaskr might fix it but you've done quests past that. Checking other quest or waiting may fix it but every bug doesn't have a (known at least) fix unfortunately.