The "Vulkan Device Lost" error in Dolphin indicates that the graphics driver has crashed or stopped responding, forcing the emulator to lose connection with your GPU (Graphics Processing Unit). This is one of the most common issues when using the Vulkan backend, but it is usually fixable.

If your device supports it, change the video backend from Vulkan to Direct3D 11/12

: Ensure your GPU's global control panel (NVIDIA/AMD) is not forcing settings like Anti-Aliasing, which can conflict with Dolphin's internal settings. for your GPU or instructions on how to disable Dual Core for a specific game?

Increase TDR timeout (Windows only, advanced)

Now, go launch Super Mario Galaxy and enjoy those galaxies without the dreaded pop-up. Your device is no longer lost—it is found.

The error is essentially a "generic" crash signal from the Vulkan API. It can be triggered by: What cause VK_ERROR_DEVICE_LOST error? - Vulkan