Translation of "post and job" plugin

hello, I have a problem with the translation of the "job and expert" plugin.

  - Download translation
  - I uploaded via FTP
  - In LOCO translate everything appears fully translated.

But it does not work,

the possible errors are as follows;

- MO file not found
- Plugin POT has a strange file name (private-messaging.mo)
- JBP WordPress is not an official language (the message "JBP: Unknown language 0%" appears in the list of languages)