The error above you get is during LaTeX compilation. So it should already been installed.
No need to install a new one. (if you do want to, then follow 1.2 Install LaTeX (TinyTeX) for PDF reports | R Markdown Cookbook)
This means that there is a character somewhere in your .tex document that is not expected.
You can have a look at this by looking at the .log file and .tex file you may have (set keep_tex: true is the output format definition)
I suspect Total_Demand_Monthly_Per_Table may contain special characters that you may need to escape for LaTeX - see 10.1 The function knitr::kable() | R Markdown Cookbook
Without a reproducible, or access to the document, we can't really say more about this. You need to dig into the log file and your document.
If you can provide more information, we may be able to help more.