Hi Robby,
Thanks so much for the fast response, the extra info, and the quick fix! My project does indeed now open. I'll check out the link you sent and, hopefully, figure out how to make sure I'm not messing it up and causing these issues. I fully realize I may be futzing my way into trouble. It is one of my skills.
Regarding my use of RStudio Cloud for teaching, I participated in a workshop at FOSS4G NA 2018 where we used RStudio Cloud very successfully. I was quite impressed; you folks are building a great tool! We were all able to quickly get up and running without the issues of different OS's, versions, admin rights, etc. It was wonderful!
I also now understand that you are in alpha and all that should imply. Frankly, I wouldn't have thought that if I hadn't seen it on the topic list earlier today and read your confirmation. Therefore, I'm torn: getting 35 - 40 folks to show up with R & RStudio correctly installed is a daunting (if not impossible) task. But having my project fail to load at all, would be at least as problematic. My R-interpretive-dance skills are just not that good!
That is why I was asking about others' experience, not as a ding against RStudio Cloud, but just as a reality check for some additional data points on real-world usage.
With all that said, thanks for the great project! Please pass my regards and compliments on to the whole RStudio Team; your work is making a lot of the rest of our jobs easier! Thanks!
Cheers,
Dave