App deployment failing - "Release file for bullseye-security is expired"

Hey there, thanks for sharing your question and all those helpful details (and welcome if this is your first post! ). The error “Release file for bullseye-security is expired” during apt dependencies installation is due to the Debian security repository’s InRelease file being expired, which is an upstream issue with the Debian mirror used by Streamlit Community Cloud—not a problem with your code or packages.txt.