Can't install on Kubuntu 23.04

[bobsquareeyes]

When I'm trying to install, when I build, I get no errors, but then when running, I get this:
Minecraft/src/renderer/Renderer.cpp (line 57) Info:
[2023-06-24 11:24:58]: GLAD initialized.
Minecraft/src/renderer/Renderer.cpp (line 58) Info:
[2023-06-24 11:24:58]: Hello OpenGL 4.6
Minecraft/src/renderer/Shader.cpp (line 49) Info:
[2023-06-24 11:24:58]: Compiling shader: assets/shaders/DebugShader2D.glsl
Minecraft/src/renderer/Shader.cpp (line 337) Error:
[2023-06-24 11:24:58]: Could not open file: 'assets/shaders/DebugShader2D.glsl'
Minecraft/src/renderer/Shader.cpp (line 137) Error:
[2023-06-24 11:24:58]: (null)
Minecraft/src/renderer/Shader.cpp (line 138) Assertion Failure:
[2023-06-24 11:24:58]: Shader linking failed!

I checked and found the file there.

Install make / cmake / g++ , and run the ssh script provided in readme.md. It builds, but then doesn't work on startup

A clear and concise description of what you expected to happen.

OS: Kubuntu 23.04 (mostly) Fresh install.