The code below works for me on some boxes, but not others and I am attempting to figure out what the difference is: ``` > stringr::str_replace("aba", "b", "$" ) Error in stri_replace_all_regex(x, c("\\$", "\\\\(\\d)"), c("\\\\$", "\\$$1"), : Unknown ICU error. (U_REGEX_INVALID_CAPTURE_GROUP_NAME) Enter a frame number, or 0 to exit 1: stringr::str_replace("aba", "b", "$") 2: fix_replacement(replacement) 3: stri_replace_all_regex(x, c("\\$", "\\\\(\\d)"), c("\\\\$", "\\$$1"), vecto ```