Error in as.environment(pos) : no item called "mydf" on the search list

[MIRIAMMUNROE]

I an trying to do a swirl course and when instructed to remove a data frame from my workspace i get the above error. I am unable to skip or proceed with course.

I have deleted the mydf manually from the global environment and the object is no longer on my list, uninstalled and reinstalled r and r studio but still get the same error. help

rm(list=ls())
Error in rm(list = ls()) : unused argument (list = ls())
swirl()

To avoid confusion and keep things running smoothly, let's remove the original data frame from your workspace with rm("mydf").

rm("mydf")
Error in as.environment(pos) : no item called "mydf" on the search list