[Python] Unexpected "does not contain #version" error adding basic shader to Ursina/Panda3D...

My game project is built in Ursina, which is just Panda3D under the hood with some convenience functions.

I've tried adding a basic glsl vertex and fragment shader to a test file I have, and every time I run it outputs:

:shader(warning): GLSL shader created-shader does not contain a #version line!


I'm confused by this because:

• my shader is loaded into a variable called testSharer;
• it's loading from files called testVertexShader.glsl; and testFragShader.glsl; and
• the shaders both start with #version 150 before anything else.

Here's how I load the shaders:

from ursina import *
import numpy as np
WINDOW_WIDTH, WINDOW_HEIGHT = 1080, 600
app = Ursina(size=(WINDOW_WIDTH,WINDOW_HEIGHT))
window.vsync = False
window.title = "BONDING POTENTIAL TEST"
window.borderless = False
window.fullscreen = False
window.fps_counter.enabled = True
window.exit_button.enabled = False
window.color = color.black
EditorCamera()
sky = Sky()
pivot = Entity()
DirectionalLight(parent=pivot, y=1.5, z=3, shadows=True, rotation=(65, -15, 45))
selectView = True
testShader = Shader(Shader.GLSL, vertex="testVertexShader.glsl", fragment="testFragShader.glsl")
firstAtom = Entity(model='sphere', scale=1., world_position=np.array([1,-10,35]), color=color.red, shader=testShader)
secondAtom = Entity(model='sphere', scale=1., world_position=np.array([34,-10,15]), color=color.blue, shader=testShader)


Can anyone give me any clues what to change or add to overcome the "does not contain #version line" error?

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