Same here; I have gotten the TBM to load maybe 3 or 4 times in Vulkan, but 95% of the time the load screen just hangs and I need to force-quit X-Plane. Every time, the Log.txt file contains: "TBM900[helpers.c:1123]: Failed to create invisible OpenGL context: A directory service error has occurred," which is what led me to this thread.
@PhoenixNelson and @skiselkov I would sure appreciate knowing what the fix is :-)