Vulkan issue on GPD XD+

[Hiko]

Hi, I am running Dolphin build 5.0.8987 on my GPD XD+.

As I experienced rather slow frame speed when running The Legend of Zelda The Wind Waker, I thought the performance could be better if I change the video backend from opengl to vulkan.

However, after I saved the settings and tried to running the game, Dolphin reported "Dolphin emulator stopped working" and asked me to relaunch the application.

Is this a bug or there are some other configurations that I need to to?

Thanks