is gdal installed? if it is, try setting gdal_library_path in your settings. code example

Example: install gdal ubuntu

sudo add-apt-repository -y ppa:ubuntugis/ppa
sudo apt update 
sudo apt upgrade # if you already have gdal 1.11 installed 
sudo apt install gdal-bin python-gdal python3-gdal # if you don't have gdal 1.11 already installed