Hi there,
I dug a bit further, and I was able to determine the issue is that your project storage is full. There were multiple GB of cached RMarkdown output chunks saved to disk which was preventing the project from starting properly. If you try to open the project again, it should start normally.
In the future, if you're working on many large notebooks with large data-sets, I would advise you to periodically clean the notebook cache using the "Clear All Output" command:
