cadastros <- data.frame(
  email = c('joaodasilva@gmail.com', 'rafael@hotmail.com', 'maria@uol.com.br', 'juliana.morais@outlook.com'),
  telefone = c('(61)99831-9482', '32 8976 2913', '62-9661-1234', '15-40192.5812')
)

> library(stringr)
    > str_replace_all(string = cadastros,
    +                 pattern = ")",
    +                 replacement = "[[:blank:]]")
    Error in stri_replace_all_regex(string, pattern, fix_replacement(replacement),  :
      Incorrectly nested parentheses in regexp pattern. (U_REGEX_MISMATCHED_PAREN)
    In addition: Warning message:
    In stri_replace_all_regex(string, pattern, fix_replacement(replacement),  :
      argument is not an atomic vector; coercingstr_replace(cadastros, 'c', " ")

> cadastros2<-cadastros%>%
> +     str_replace_all(cadastros,"6", replacement = "[[:blank:]]") Error in str_replace_all(., cadastros, "6", replacement =
> "[[:blank:]]") :    unused argument ("6")

> str_replace_all(cadastros, pattern = ")",replacement = "[[:blank:]]")
Error in stri_replace_all_regex(string, pattern, fix_replacement(replacement),  :
  Incorrectly nested parentheses in regexp pattern. (U_REGEX_MISMATCHED_PAREN)
In addition: Warning message:
In stri_replace_all_regex(string, pattern, fix_replacement(replacement),  :
  argument is not an atomic vector; coercing

> str_replace_all(cadastros, pattern = ")","[[:blank:]]")
Error in stri_replace_all_regex(string, pattern, fix_replacement(replacement),  :
  Incorrectly nested parentheses in regexp pattern. (U_REGEX_MISMATCHED_PAREN)
In addition: Warning message:
In stri_replace_all_regex(string, pattern, fix_replacement(replacement),  :
  argument is not an atomic vector; coercing