# Tex Live do not include version of local installation

I'm trying to modify the final PDF document by changing the fonts, margins etc. by adding additional Latex, how ever I keep getting the error:

``````tlmgr.pl: The TeX Live versions supported by the repository
http://ctan.forsale.plus/systems/texlive/tlnet
(2016--2018)
do not include the version of the local installation
(2019).
``````

This works:

``````---
title: "Untitled"
author: "Author"
date: "15/04/2020"
output: pdf_document
---
``````

But this throws an error:

``````---
title: "Untitled"
author: "Author"
date: "14/04/2020"
output:
pdf_document:
latex_engine: xelatex