Can't login, says I need game time when I have game time =/

[Revannia-draenor (Revannia)]

This specific stress test is focused on NA/OCE servers. There’s a stickied blue post giving info:

WoW Classic Stress Test – June 19-21

We’ll have our next stress test for WoW Classic on 2019-06-19T21:00:00Z (UTC). This stress test will be accessible to anyone with an active World of Warcraft game account in the Americas & Oceania region. For players who have not yet tested World of Warcraft Classic, the game will become available for download late tomorrow, June 18. We’ve posted some additional info here. For this stress test, all races and classes will be available for creation, and the maximum character level will be capped …

Another blue post on EU forums said that the July test will be global.