Intel Ivy Bridge chips (released circa 2012) were designed before Vulkan existed. While the Linux community has created a "legacy" driver called to bring Vulkan to these older chips, the hardware itself lacks certain features required to be 100% compliant with the Vulkan specification.
The driver implements enough of Vulkan for some basic tasks, but "incomplete" means it fails certain conformance tests or lacks mandatory hardware hooks for modern gaming features. mesa-intel warning ivy bridge vulkan support is incomplete
You can set the environment variable WINED3D=opengl to force the software to use the older translation layer instead of Vulkan. Intel Ivy Bridge chips (released circa 2012) were