Getting VK_ERROR_INCOMPATIBLE_DRIVER

I am getting the same error. What could be the problem?
Following are the details:

ece$ nvidia-smi
Mon Aug 28 16:21:36 2017
±----------------------------------------------------------------------------+
| NVIDIA-SMI 384.59 Driver Version: 384.59 |
|-------------------------------±---------------------±---------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce GTX 1080 Off | 00000000:07:00.0 Off | N/A |
| 0% 43C P8 12W / 198W | 1MiB / 8114MiB | 0% Default |
±------------------------------±---------------------±---------------------+
| 1 GeForce GTX 980 Off | 00000000:09:00.0 On | N/A |
| 15% 53C P0 55W / 195W | 158MiB / 4037MiB | 0% Default |
±------------------------------±---------------------±---------------------+

±----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 1 1721 G /usr/bin/X 78MiB |
| 1 2693 G /usr/bin/gnome-shell 76MiB |
±----------------------------------------------------------------------------+

ece$ vulkaninfo

VULKAN INFO

Vulkan API Version: 1.0.51

INFO: [loader] Code 0 : Found ICD manifest file /etc/vulkan/icd.d/nvidia_icd.json, version “1.0.0”
ERROR: [loader] Code 0 : NV_VK_ICD: cannot open shared object file: No such file or directory
Cannot create Vulkan instance.
/builddir/build/BUILD/Vulkan-LoaderAndValidationLayers-sdk-1.0.51.0/demos/vulkaninfo.c:671: failed with VK_ERROR_INCOMPATIBLE_DRIVER