Defunct as of rlang 0.3.0 and mutate_impl

Question

I am trying to use the following function but every time I do, I receive the error below. I tried installing an older version of rlang as it works on a different R Studio bu

Answer 1

What worked for me (though to be honest I don't fully understand why):

1) Delete the rlang folder from the computer (on Windows: R/win-library/3.4)
2) install.packages("dplyr")

In the two cases where I encountered this problem, the system was operating on R 3.4 with Windows. It's possible that the R3.4/Windows had something to do with it.