rename_at() issue message

Question

I am in the process of debugging someone else's code and my one and only question is regarding rstudio in general. As someone with minimal experience in R/Rstudio, when I try to search the following error from console in the actual script, nothing comes back so I am curious where am I supposed to find the error then?

Here is the error message:

<error/vctrs_error_subscript_oob>
Error in `dplyr::rename_at()`:
! Can't subset columns that don't exist.
x Column `mditext_hash0001` doesn't exist.

There's nothing in the code by the name of mditext_hash0001 so I was thinking if it's somehow hidden within the script. Also when I tried looking up the dplyr::rename_at() text within the code nothing appears so I am not sure if I am even looking at the right place.