I know everyone who hasn't spent the last month on the test server is anxious to get into the Foundry following the Feywild update, but please remember that the Foundry will not be live immediately after the servers open.
Quests will be automatically republished throughout the day and possibly into tomorrow.
The Foundry Editor will be up hopefully later today.
This does not mean that you will lose any playcounts and ratings as these are recorded to the quests short code, the only way to remove these is to copy the quest and publish the copy, so relax, all your hard work will be restored as it was before the patch, but don't panic if you can't find your quests immediately.
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Being honest, it's probably neither here nor there when publishing today, but it should be publishable as soon as the editor goes up this afternoon.