[Koha] Unable to upload "koha-coverflow-plugin-v2.4.25"

[Igbudu Tersoo]

Hi,
I am using koha 18.11 running on ubuntu 16.04. I am trying to upload the
plugin file "koha-coverflow-plugin-v2.4.25" and am receiving this error
message "*Cannot unpack file to the plugins directory. Please verify that
the Apache user can write to the plugins directory". *
Please i need help.
Thank you.

Murphy Igbudu
Systems Librarian
University Library and Information
Services, Benue State University
Makurdi. Nigeria.