Error upgrading PHP, "configure: error: libxml2 not found"

#1
I'm attempting to upgrade from PHP 7.2.24 to 7.3.11 (the latest version of PHP available in this installation).

During the upgrade I'm getting this error (below). Is there a guide on the upgrading process I can follow?

Screenshot 2020-10-28 at 01.22.47.png
 
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