Well, sometimes happens that Colab Screen is not really updated with the SD folder.
I recommend you to go to Google Drive, delete that folder, and start with the process, it will take you 4 minutes.
If you still having issues, contact me in jorge@jorgevila.com and we can setup a zoom so I can help you in real time,
Thanks!

Hello,
I deleted everything and started over, but it still didn't work when I got to the final step.
It put a green checkmark by it, but gave this error instead of the link: python3: can't open file '/content/gdrive/MyDrive/sd/stable-diffusion-webui/webui.py': [Errno 2] No such file or directory
Here's the code for it, just in case this is helpful:
#@markdown # Start stable-diffusion
from IPython.utils import capture
import time
import sys
import fileinput

Model_Version = "1.5" #@param ["1.5", "V2-512", "V2-768"]
#@markdown - Important! Choose the correct version and resolution of the model

Use_Gradio_Server = False #@param {type:"boolean"}
#@markdown - Only if you have trouble connecting to the local server

Enable_API = False #@param {type:"boolean"}
#@markdown - You can find the docs in the [wiki](https://github.com/AUTOMATIC1111/stable-diffusion-webui/wiki/API)

with capture.capture_output() as cap:
if not os.path.exists('/tools/node/bin/lt'):
!npm install -g localtunnel

with capture.capture_output() as cap:
%cd /content/gdrive/MyDrive/sd/stable-diffusion-webui/
time.sleep(1)
!wget -O webui.py https://raw.githubusercontent.com/AUTOMATIC1111/stable-diffusion-webui/master/webui.py
!sed -i 's@gpu_call).*@gpu_call) \n shared.demo.queue(concurrency_count=111500)@' /content/gdrive/MyDrive/sd/stable-diffusion-webui/webui.py
%cd /content/gdrive/MyDrive/sd/stable-diffusion-webui/modules/
!wget -O ui.py https://raw.githubusercontent.com/AUTOMATIC1111/stable-diffusion-webui/master/modules/ui.py
!sed -i 's@css = "".*@with open(os.path.join(script_path, "style.css"), "r", encoding="utf8") as file:\n css = file.read()@' /content/gdrive/MyDrive/sd/stable-diffusion-webui/modules/ui.py
%cd /content/gdrive/MyDrive/sd/stable-diffusion-webui
!wget -O style.css https://raw.githubusercontent.com/AUTOMATIC1111/stable-diffusion-webui/master/style.css
!sed -i 's@min-height: 4.*@min-height: 5.5em;@g' /content/gdrive/MyDrive/sd/stable-diffusion-webui/style.css
%cd /content


share=''
if Use_Gradio_Server:
share='--share'
for line in fileinput.input('/usr/local/lib/python3.8/dist-packages/gradio/blocks.py', inplace=True):
if line.strip().startswith('self.server_name ='):
line = ' self.server_name = server_name\n'
if line.strip().startswith('self.server_port ='):
line = ' self.server_port = server_port\n'
sys.stdout.write(line)
clear_output()

else:
share=''
!nohup lt --port 7860 > srv.txt 2>&1 &
time.sleep(2)
!grep -o 'https[^ ]*' /content/srv.txt >srvr.txt
time.sleep(2)
srv= getoutput('cat /content/srvr.txt')

for line in fileinput.input('/usr/local/lib/python3.8/dist-packages/gradio/blocks.py', inplace=True):
if line.strip().startswith('self.server_name ='):
line = f' self.server_name = "{srv[8:]}"\n'
if line.strip().startswith('self.server_port ='):
line = ' self.server_port = 443\n'
if line.strip().startswith('self.protocol = "https"'):
line = ' self.protocol = "https"\n'
if line.strip().startswith('if self.local_url.startswith("https") or self.is_colab'):
line = ''
if line.strip().startswith('else "http"'):
line = ''
sys.stdout.write(line)

!sed -i '13s@.*@ "PUBLIC_SHARE_TRUE": "Connected",@' /usr/local/lib/python3.8/dist-packages/gradio/strings.py

!rm /content/srv.txt
!rm /content/srvr.txt

with capture.capture_output() as cap:
%cd /content/gdrive/MyDrive/sd/stablediffusion

api = '--api' if Enable_API else ''

if Model_Version == "V2-768":
configf="--config /content/gdrive/MyDrive/sd/stablediffusion/configs/stable-diffusion/v2-inference-v.yaml"
elif Model_Version == "V2-512":
configf="--config /content/gdrive/MyDrive/sd/stablediffusion/configs/stable-diffusion/v2-inference.yaml"
else:
configf=""

if os.path.exists('/usr/local/lib/python3.8/dist-packages/xformers'):
xformers="--xformers"
else:
xformers=""

try:
model
if os.path.isfile(model):
!python /content/gdrive/MyDrive/sd/stable-diffusion-webui/webui.py $share $api --disable-safe-unpickle --no-half-vae --ckpt "$model" $configf $xformers
else:
!python /content/gdrive/MyDrive/sd/stable-diffusion-webui/webui.py $share $api --disable-safe-unpickle --no-half-vae --ckpt-dir "$model" $configf $xformers
except:
!python /content/gdrive/MyDrive/sd/stable-diffusion-webui/webui.py $share $api --disable-safe-unpickle --no-half-vae $configf $xformers


Thank you for your help.