Bad Gateway Time Out - 504 on creating public URL

Using Streamlit
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  1. I’m running my app locally as of now, the real problem started on creating a public URL using LocalTunnel !
    2.URL: https://hungry-papayas-hear.loca.lt/ .
  2. GitHub repository : GitHub - Soumilgit/Gesture-Sign-Language-Detection-using-Python: Recorded using my own extension:) .
  3. I even followed some Google forums anc put the tunnel password IP onto the ‘Friendly Reminder’ page, checked multiple times and it was correct password, still it gives error message : 504 Gateway Time-out | nginx/1.17.9 .
  4. Streamlit: Latest version. Python version: 3.12.
  5. Can anyone please guide me on what to do and fix it? Please tell, even if it’s a GPU issue/PC issue due to which the libraries won’t render properly on a site!