Invalid byte position (current: 0, received: 0)

Please i bought filmic template from Envato for my website, i installed it,when i want to install the filmic demo under demo content install, it showing Invalid byte position (current: 0, received: 0)
please is there anyone know how to rectify this.

Hi

Please check the theme documentation hopefully you will get necessary support.

Otherwise the best way to get the support is Contact your purchased theme Author. How to Contact Author and let them know. Don’t worry just contact theme Author. theme Author will be very happy to assist you.

Thanks

grateful,i have contacted them but i was told my support subscription is for just 6month.i dont know what to do

may be your support (6 month from the purchased date) period has expired and author want you extend the support period to get their support.