I had this same problem (Ubuntu 20.04 with Nvidia 515 driver and vulkan 1.2.131)…commenting out that line and re-compiling worked to fix it…
However I think it may cause some other issues. When repositioning objects in 2D view the emissive lighting materials get messed up. After repositioning the emissive material actor in 2D view the lighting is broken; it does not cast light correctly (at certain angles the light disappears). If you reposition the actor in normal 3D perspective mode then this issue does not occur.