$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

How to Install Libtiff4 & Libtiff4-dev for Ubuntu 16.04 Xenial GNU+Linux Easy Guide

February 23, 2017 | By the+gnu+linux+evangelist.

libtiff4 Ubuntu 16.04 Installation Guide

The Linux Ubuntu Tutorial shows you Step-by-Step How to Install libtiff4 and libtiff4-dev Packages on Ubuntu 16.04 Xenial Xerus LTS GNU/Linux.

Especially relevant: you should try first to Setup the available libtiff5 Library and see if it Fix your issue.

And libtiff4 for Ubuntu Xenial is the Tag Image File Format (TIFF) library.

install libtiff4 on ubuntu 16.04 Xenial - Featured
  1. Open a Shell session
    Ctrl+Alt+t on desktop
    (Press “Enter” to Execute Commands)

    install libtiff4 on ubuntu 16.04 Xenial - Open Terminal

    In case first see: Terminal QuickStart Guide.