i am getting this error while adding the code snippet for inventory to my game. can someone explain it?

[ShivamKR12]

screen resolution: (1366, 768)
Known pipe types:
wglGraphicsPipe
(3 aux display modules not yet loaded.)
:pnmimage:png(warning): iCCP: known incorrect sRGB profile
:ffmpeg(warning): Estimating duration from bitrate, this may be inaccurate
Known pipe types:
wglGraphicsPipe
(3 aux display modules not yet loaded.)
Traceback (most recent call last):
File "c:\Users\Shivam\Desktop\voxel 3d\minecraft\try3.py", line 171, in
app = Ursina()
^^^^^^^^
File "C:\Users\Shivam\AppData\Local\Programs\Python\Python312\Lib\site-packages\ursina\main.py", line 28, in init
super().init()
File "C:\Users\Shivam\AppData\Local\Programs\Python\Python312\Lib\site-packages\direct\showbase\ShowBase.py", line 429, in init
raise Exception("Attempt to spawn multiple ShowBase instances!")
Exception: Attempt to spawn multiple ShowBase instances!

[ShivamKR12]

from ursina import *
from ursina.prefabs.first_person_controller import FirstPersonController
#from ursina.prefabs.exit_button import *

t = -1
app = Ursina()
a = Audio('assets/song_Forest.mp3', pitch=1, loop=True, autoplay=True)
a.volume=5
window.title = 'Minecraft_clone' # The window title
window.borderless = False # Show a border
window.fullscreen = False # Do not go Fullscreen
#window.exit_button.visible = False # Do not show the in-game red X that loses the window
window.fps_counter.enabled = True
window.cursor_hidden = False
#window.icon = "/assets/tree.jpg"

grass_texture = load_texture("assets/download.jpg")
sky_texture = load_texture("assets/sky.jpg")
soil_texture = load_texture("assets/soil.jpg")
tree_texture = load_texture("assets/tree.jpg")
plank_texture = load_texture("assets/planks.jpg")
leaf_texture = load_texture("assets/leaf.jpg")
wall_texture = load_texture("assets/wall.jpg")
stone_texture = load_texture("assets/stone.png")
iron_texture = load_texture("assets/images.png")
gold_texture = load_texture("assets/gold.png")
wall_2_texture = load_texture("assets/1.png")
current_texture = soil_texture

def update():
global current_texture
if held_keys['q']: exit()
if held_keys['Q']: exit()
if held_keys['1']: current_texture = grass_texture
if held_keys['2']: current_texture = soil_texture
if held_keys['3']: current_texture = tree_texture
if held_keys['4']: current_texture = plank_texture
if held_keys['5']: current_texture = leaf_texture
if held_keys['6']: current_texture = wall_texture
if held_keys['7']: current_texture = stone_texture
if held_keys['8']: current_texture = gold_texture
if held_keys['9']: current_texture = iron_texture
if held_keys['0']: current_texture = wall_2_texture

class Sky(Entity):
def init(self):
super().init(
parent=scene,
model='sphere',
scale=150,
texture=sky_texture,
double_sided=True
)

class Voxel(Button):
def init(self, position=(0, 0, 0), texture=grass_texture):
super().init(
parent=scene,
model='cube',
color=color.white,
texture=texture,
highlight_color=color.white,
position=position,
origin__y=0.5
)

def input(self, key):

    if self.hovered:
        if key == "left mouse down":
            voxel = Voxel(position=self.position + mouse.normal, texture= current_texture)
        if key == "right mouse down":
            destroy(self)

for z in range(6):
for x in range(6):
voxel = Voxel((x, 0, z), texture= grass_texture)
while t >= -10:
for z in range(6):
for x in range(6):
voxel = Voxel((x, t, z) , texture= soil_texture)
t-=1
player = FirstPersonController()
sky = Sky()
app.run()

this is the code to which i am trying to add the code of the inventory, so please help me.

[Creator754915]

Can i have more details pls ?

[ShivamKR12]

ya, sure. so, i was trying to add inventory to a small game of mine but everytime i tryed to run the code, i got the same error (or similar error). i tryed many different iterations but non of them seemed to work properly. if you like, i can provide you with those codes that i tryed so you can look into it.

[pokepetter]

It's because you did Ursina() multiple times. Remember that importing a module will run the code inside it. I suspect you either had Ursina() multiple places in one file, or you did Ursina() in a module you imported and in the file you ran.
However, this error you got is not possible in newer versions of ursina for quite some time, since it will detect duplicates and reuse the same instance again, thus allowing this behavior.