Urgent: Error 54113 (Varnish cache server) on deployed app - 403 Forbidden

Community Cloud
1

Hello Streamlit team,

My app is currently completely down and showing an “Error 403 Forbidden” screen. It runs perfectly on my local machine but shows this blank error screen on the deployed Community Cloud link. I suspect my app’s URL might have been blocked by the Fastly CDN/firewall.

For context, my app is a news and travel information website for Koreans in Thailand (Thai-Today), which fetches some external data (like local news and travel info). It seems it might have been mistakenly flagged as a bot by the CDN. Could you please help investigate and unblock the URL?

Here is the required information:

  • Are you running your app locally or is it deployed? It is deployed.

  • Is it deployed on Community Cloud or another hosting platform? Streamlit Community Cloud.

  • Link to the public deployed app: thai-today.com

  • Link to your app’s public GitHub repository: https://github.com/anjwoo220/news

  • Full text of the error message: Error 403 Forbidden Forbidden Error 54113 Details: cache-sin-wsat1880072-SIN 1771669755 771654438 Varnish cache server

  • Streamlit and Python versions: Python : 3.14.2 / Streamlit : Streamlit 1.52.2

Thank you for your help!

2

Hey there, thanks for reaching out and welcome to the Streamlit community! :rocket: Sorry you’re running into this 403 Forbidden error on your deployed app—this is a common issue and can be super frustrating, especially when everything works fine locally. The error you’re seeing (“Error 403 Forbidden” with Fastly/Varnish details) means your Streamlit Community Cloud account or app URL has likely been blocked, either due to exceeding fair-use/resource limits or being mistakenly flagged by the CDN/firewall. This can happen if your app triggers automated protections (e.g., by making frequent external requests or appearing bot-like), or if there’s a false positive in Streamlit’s monitoring system.

To resolve this, you’ll need to open a support ticket with Streamlit/Snowflake and include your GitHub username and app details. The support team will review your case and can unblock your account or app if appropriate. You can find the step-by-step process in the official docs: How to submit a support case for Streamlit Community Cloud and Login attempt to Streamlit Community Cloud fails with error 403. This is the recommended and fastest way to get your app back online. If you have a minimum reproducible example or more logs, please share them in your support request or here for community input!

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