https://rstudio.cloud/project/280090
Attempted to relaunch, did not work.
A separate project elsewhere appears to be working just fine, so I suspect this project hit a wall, perhaps disk or RAM-related; though unsure why a relaunch would not resolve this.
Edit: Upon relaunch
Task d3d4b586-ea29-4da3-a4cb-f1868c9fd8fb failed: Timeout waiting for application=813015 deployment=2792851 replicas to become ready.