Package check result: ERROR

Check: examples, Result: ERROR
  Running examples in ‘BLSloadR-Ex.R’ failed
  The error most likely occurred in:
  
  > base::assign(".ptime", proc.time(), pos = "CheckExEnv")
  > ### Name: get_ces
  > ### Title: Download Current Employment Statistics (CES) Data
  > ### Aliases: get_ces
  > 
  > ### ** Examples
  > 
  > ## No test: 
  > # Fast download: Massachusetts and Connecticut data only (all industries)
  > ces_states <- get_ces(states = c("MA", "CT"))
  Error in UseMethod("select") : 
    no applicable method for 'select' applied to an object of class "NULL"
  Calls: get_ces ... <Anonymous> -> <Anonymous> -> <Anonymous> -> <Anonymous>
  Execution halted

Check: for detritus in the temp directory, Result: NOTE
  Found the following files/directories:
    ‘calibre-f15v3322’ ‘calibre-m2comkl8’