Search not working on PDF content

Hi,
I’m trying to get the search option to work but I get this error – This function cannot be enabled because text was not parsed from PDF…. I’m using the PRO addon – and pdf’s that only have text, no images… I appreciate any help.
 
Plugin Requirements
PHP is 5.3 or higher
ImageMagick or GraphicsMagick PHP Extension is loaded
Imagick or Gmagick PHP Wrapper is supported. v.ImageMagick 6.7.8-9 2016-06-16 Q16 http://www.imagemagick.org
Imagick or Gmagick PDF Support is enabled
GhostScript is not supported
Upload folder: /home/xxrqtgzt/public_html/wp-content/uploads/pdf-light-viewer is writable
Logs folder: /home/xxrqtgzt/public_html/wp-content/pdf-light-viewer-logs/ is writable

Server Info
os -> Linux cpanel11.mywebserver.co.za 3.10.0-714.10.2.lve1.4.79.el7.x86_64 #1 SMP Thu Jan 4 13:30:50 EST 2018 x86_64
php -> 5.4.45
mysql -> 5.6.39
wordpress -> 4.9.7
Theme
OceanWP, 1.5.18, https://oceanwp.org/
from Nick, https://oceanwp.org/about-me/
Plugins
Admin Custom Login, 2.6.3, https://weblizar.com/plugins/
Elementor, 2.1.2, https://elementor.com/?utm_source=wp-plugins&utm_campaign=plugin-uri&utm_medium=wp-dash
Password Protected, 2.2.2, https://wordpress.org/plugins/password-protected/
PDF Light Viewer Plugin Pro, 0.2.1, http://pdf-light-viewer.wp.teamlead.pw/pro/
PDF Light Viewer Plugin, 1.3.22, http://pdf-light-viewer.wp.teamlead.pw/
Real-Time Find and Replace, 3.9, http://infolific.com/technology/software-worth-using/real-time-find-and-replace-for-wordpress/
Relevanssi, 4.0.10.1, https://www.relevanssi.com/