[I][VK  ]   VK_EXT_transform_feedback (/home/joan/Desktop/anki/src/anki/gr/vulkan/GrManagerImpl.cpp:504 initDevice)
[I][VK  ]   VK_EXT_vertex_attribute_divisor (/home/joan/Desktop/anki/src/anki/gr/vulkan/GrManagerImpl.cpp:504 initDevice)
[I][VK  ]   VK_GOOGLE_decorate_string (/home/joan/Desktop/anki/src/anki/gr/vulkan/GrManagerImpl.cpp:504 initDevice)
[I][VK  ]   VK_GOOGLE_hlsl_functionality1 (/home/joan/Desktop/anki/src/anki/gr/vulkan/GrManagerImpl.cpp:504 initDevice)
[E][VK  ] VK_EXT_descriptor_indexing is required (/home/joan/Desktop/anki/src/anki/gr/vulkan/GrManagerImpl.cpp:561 initDevice)
[E][VK  ] Vulkan initialization failed (/home/joan/Desktop/anki/src/anki/gr/vulkan/GrManagerImpl.cpp:97 init)
[E][CORE] App initialization failed (/home/joan/Desktop/anki/src/anki/core/App.cpp:310 init)
[E][N/A ] Error reported. To run ./../../build/samples/sponza/sponza you have to navigate to the /path/to/anki/samples/sponza. And then execute it (/home/joan/Desktop/anki/samples/sponza/Main.cpp:41 main)
joan@joan-X260:~/Desktop/anki/samples/sponza (master)$ sudo apt install mesa-vulkan-drivers/bionic-updates
[sudo] password for joan:
Reading package lists... Done
Building dependency tree
Reading state information... Done
mesa-vulkan-drivers is already the newest version (19.0.8-0ubuntu0~18.04.1).
Selected version '19.0.8-0ubuntu0~18.04.1' (Ubuntu:18.04/bionic-updates [amd64]) for 'mesa-vulkan-drivers'
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
joan@joan-X260:~/Desktop/anki/samples/sponza (master)$ mesa

Command 'mesa' not found, did you mean:

  command 'mesg' from deb util-linux
  command 'mesg' from deb orville-write

Try: sudo apt install <deb name>

joan@joan-X260:~/Desktop/anki/samples/sponza (master)$ glxinfo | grep "OpenGL version"
OpenGL version string: 3.0 Mesa 19.0.8