Pterodactyl on Docker compose installing blueprint extension error.

george@AthenaServer:~/mypterodactyl$ blueprint -install nebula
10:17:34 INFO: Searching and validating framework dependencies..
[nebula.zip]
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in one of nebula.zip or
        nebula.zip.zip, and cannot find nebula.zip.ZIP, period.
[nebula.zip]
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in one of nebula.zip or
        nebula.zip.zip, and cannot find nebula.zip.ZIP, period.
10:17:34 FATAL: Extension configuration file not found or detected.