Problem exists as well with Vanilla R for sure. I'll experiment with console.
I think Plan B, or at least test B, will be to copy the concerning set of folders to another drive and see if I can just carry on.
Plan C will be to try a total uninstall reinstall.
I ask myself, "what changed"? At some point, I likely played around with trying to run RStudio from Anaconda and then backed out. I just can't be certain it was before or after the problem. Only a month ago it was all good, I was leveling up on leaflet and tmap, having a great time.
PS. Wow, I wasn't expecting a VIP to respond. Thanks!