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

How to Install Libtiff4 & Libtiff4-dev on Ubuntu 21.04

April 9, 2021 | By the+gnu+linux+evangelist.

GNU/Linux Ubuntu 21.04 Installing libtiff4 Guide

Hi! The Tutorial shows you Step-by-Step How to Install libtiff4 and libtiff4-dev Packages on Ubuntu 21.04 Hirsute 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 Hirsute is the Tag Image File Format (TIFF) library.

install libtiff4 on ubuntu 21.04 Hirsute - Featured
  1. 1. Launching Terminal

    How to QuickStart with Command Line on Ubuntu GNU/Linux

    Bash Shell Ubuntu QuickStart Guide