Non-steam HL2 in Linux - Engine Error, Could not load: GameUI

[LegendaryGuard]

Laptop contains:
Ubuntu 16.04 32bits, Intel Core 2 Duo processor T5550 1.83Ghz CPU, 4gb DDR2 RAM.

That's a test in an old laptop from 2005~2007 using non-steam game. All of you know, still, source engine won't work without steam... As it was told in other issues: #131 and #132 (comment)

This error happened in an Ubuntu VM too.

Log:

>>> Engine(arch:i386 commit:ba90de2-dirty) started at Sat Nov 19 18:01:27 2022

[61.7037] LoadLibrary: path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libfilesystem_stdio.so
[61.7038] SDL video target is 'x11'
[61.7038] LoadLibrary: pModule: engine.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libengine.so
[61.7038] LoadLibrary: pModule: inputsystem.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libinputsystem.so
[61.7038] LoadLibrary: pModule: materialsystem.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libmaterialsystem.so
[61.7038] LoadLibrary: pModule: datacache.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libdatacache.so
[61.7038] LoadLibrary: pModule: studiorender.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libstudiorender.so
[61.7038] LoadLibrary: pModule: vphysics.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libvphysics.so
[61.7038] LoadLibrary: pModule: video_services.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libvideo_services.so
[61.7038] LoadLibrary: pModule: vguimatsurface.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libvguimatsurface.so
[61.7038] LoadLibrary: pModule: vgui2.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libvgui2.so
[61.7038] Can't find module - sourcevr.so
[61.7039] AppFramework : Unable to load module sourcevr.so!
[61.7039] LoadLibrary: path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libfilesystem_stdio.so
[61.7039] LoadLibrary: pModule: shaderapidx9.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libshaderapidx9.so
[61.7039] Can't find module - video_bink
[61.7039] Can't find module - video_webm
[62.1305] Using Breakpad minidump system. Version: 2257546 AppID: 220
[62.1327] filesystem BaseDir: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr
[64.3771] Did not detect any valid joysticks.
[64.3822] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/stdshader_dbg.so
[64.3822] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libstdshader_dbg.so
[64.3823] Can't find module - stdshader_dbg.so
[64.3823] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/stdshader_dx6.so
[64.3823] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libstdshader_dx6.so
[64.3823] Can't find module - stdshader_dx6.so
[64.3824] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/stdshader_dx7.so
[64.3825] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libstdshader_dx7.so
[64.3825] Can't find module - stdshader_dx7.so
[64.3826] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/stdshader_dx8.so
[64.3827] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libstdshader_dx8.so
[64.3828] Can't find module - stdshader_dx8.so
[64.3829] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/stdshader_dx9.so
[64.3830] LoadLibrary: path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libstdshader_dx9.so
[64.3852] Convar mat_specular has conflicting FCVAR_CHEAT flags (child: FCVAR_CHEAT, parent: no FCVAR_CHEAT, parent wins)
[65.6818] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/vaudio_minimp3
[65.6819] LoadLibrary: path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libvaudio_minimp3.so
[66.9664] Could not load program cache file glbaseshaders.cfg
[66.9666] Could not find base GL shader cache file
[66.9669] Could not load program cache file glshaders.cfg
[66.9669] Could not find user GL shader cache file
[66.9670] Precache: Took 0 ms, Vertex 0, Pixel 0
[66.9673] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/hl2/bin/client
[66.9673] LoadLibrary: path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/hl2/bin/libclient.so
[66.9757] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/hl2/bin/server.so
[66.9758] LoadLibrary: path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/hl2/bin/libserver.so
[66.9855] server.so loaded for "Half-Life 2"
[66.9856] LoadLibrary: pModule: soundemittersystem.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libsoundemittersystem.so
[66.9860] LoadLibrary: pModule: scenefilecache.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libscenefilecache.so
[66.9863] LoadLibrary: pModule: engine.so, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libengine.so
[67.0262] Convar developer has multiple help strings:
	parent (wins): "Set developer message level"
	child: "Set developer message level."
[67.0360] Both ConVars must be marked FCVAR_REPLICATED for linkage to work (r_VehicleViewDampen)
[67.4254] maxplayers set to 1
[67.4256] CL_InitLanguageCvar
[67.4594] Error: Material "debug/debugluxels" uses unknown shader "DebugLuxels"
[67.4798] Can't find module - /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/GameUI
[67.4799] LoadLibrary: path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libGameUI.so
[67.4807] LoadLibrary: pModule: GameUI, path: /home/ubuntu/Desktop/backup_hl2_nosteam_nillerusr/bin/libGameUI.so
[67.4812] Could not load: GameUI

[nillerusr]

I didn't understand the meaning of the issue. It works without steam.
Pre-2013 versions of game shouldn't work

[LegendaryGuard]

Maybe I could try the debug build ones, but the debug log will be the same or similar to #131 (comment), I think.