Hey, thanks for sharing all those details and welcome to the Streamlit community! You’re definitely not alone—many users have recently reported that their Streamlit Community Cloud apps get stuck at “Provisioning machine… Preparing system… Spinning up manager process…” with a blank page and no errors, even after rebooting, redeploying, or changing Python versions. This is often a platform-level issue, not a problem with your code or repo, especially if your app worked before and nothing changed in your repository.