I reported this within Coursera and this is the reply I received:
"Upon further review, I can see that this has been reported directly to the Educator offering the course.
At the moment, there isn’t an estimated timeframe as to when this will be fixed. However, any update will be made automatically, so check again in a few days to see if the changes have been made. In the meantime, you’re welcome to continue working through your course. "
Keep checking, or you can do it in RStudio desktop. I'm hoping they'll fix it soon.