Couldn't load pics/colormap.pcx error on Linux

$ ./quake2 
couldn't exec default.cfg
couldn't exec config.cfg
Console initialized.

------- sound initialization -------
Setting up ALSA driver .....
Low Performance 11KHz.
sound sampling rate: 11025
------------------------------------
------- Loading ref_vk.so -------
LoadLibrary("/home/tle/src/vkQuake2/linux/releasex64/ref_vk.so")
ref_vk version: Vulkan (vkQuake2 v1.4.4)
Initializing Vulkan display
...setting mode 11: 1920 1080
Using XFree86-VidModeExtension Version 2.2
Enabled extensions: VK_KHR_surface VK_KHR_xlib_surface 
...created Vulkan instance
...created Vulkan surface
...found 1 Vulkan-capable device(s)
...created Vulkan memory allocator
Supported present modes: VK_PRESENT_MODE_IMMEDIATE_KHR VK_PRESENT_MODE_MAILBOX_KHR VK_PRESENT_MODE_FIFO_KHR 
...using present mode: VK_PRESENT_MODE_MAILBOX_KHR
...trying swapchain extent: 1920x1080
...trying swapchain image format: 44
...created Vulkan swapchain
...created synchronization objects
...created 3 Vulkan render passes
...created Vulkan command pools
...created world depth buffer
...created UI depth buffer
...created world color buffer
...created world postpocess color buffer
...created MSAAx1 color buffer
...created 5 Vulkan image view(s)
...created 5 Vulkan framebuffers
...created 2 Vulkan commandbuffers
Successfully initialized Vulkan!

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------------------------------------
Vulkan API: 1.2
Header version: 131
Devices found:
   #0: AMD RADV VEGA10 (LLVM 10.0.0)
Using device #0:
   deviceName: AMD RADV VEGA10 (LLVM 10.0.0)
   resolution: 1920x1080
   driverVersion: 20.0.4 (0x5000004)
   apiVersion: 1.2.128
   deviceID: 26751
   vendorID: 0x1002 (AMD)
   deviceType: VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU
   gfx/present/transfer: 0/0/1
Present mode: VK_PRESENT_MODE_MAILBOX_KHR
Swapchain image format: 44
Supported present modes: VK_PRESENT_MODE_IMMEDIATE_KHR VK_PRESENT_MODE_MAILBOX_KHR VK_PRESENT_MODE_FIFO_KHR 
Enabled extensions: VK_KHR_surface VK_KHR_xlib_surface 
Enabled layers: 
Cmd_RemoveCommand: miniaudio not added
recursive shutdown
Error: Couldn't load pics/colormap.pcx
kondrak / vkQuake2

Couldn't load pics/colormap.pcx error on Linux #91
