I keep getting this error: could not find tsearch config by locale

     ts_name     | prs_name |    locale
-----------------+----------+--------------
 default_russian | default  | ru_RU.KOI8-R
 simple          | default  |
 default         | default  | C
 default_us      | default  | en_US.UTF-8

               name               |                setting                |                                         description
 ---------------------------------+---------------------------------------+----------------------------------------------------------------------------------------------
  lc_collate                      | C                                     | Shows the collation order locale.
  lc_ctype                        | en_US.UTF-8                           | Shows the character classification and case conversion locale.

Any idea why it is not finding my locale?