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

How to Install Libtiff4 & Libtiff4-dev on Ubuntu 20.04

April 22, 2020 | By the+gnu+linux+evangelist.

GNU/Linux Ubuntu 20.04 Installing libtiff4 Guide

Hi! The Tutorial shows you Step-by-Step How to Install libtiff4 and libtiff4-dev Packages on Ubuntu 20.04 Focal 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 Focal is the Tag Image File Format (TIFF) library.

install libtiff4 on ubuntu 20.04 Focal - Featured
  1. 1. Launching Terminal

    How to QuickStart with Command Line on Ubuntu GNU/Linux

    Bash Shell Ubuntu QuickStart Guide