Due to technical issues, the Patch 9.2 PTR will remain offline until tomorrow, Thursday December 2nd.
Blizzard Hello! While updating our PTR realms to patch 9.2, we ran into a few technical issues that are preventing us from marking realms live to testers. PTR Realms will remain offline in maintenance mode tonight, and we hope to be able to bring them up to players tomorrow morning (US Pacific Time) once we get a fix deployed. Read more on wowhead.com