Suddenly, doc won't complie

[Rich Shepard]

On Thu, 10 Oct 2019, Richard Kimberly Heck wrote:

> This is under Document> Settings>Language. Under Encoding, you can select
> something. Sorry this is giving you so much trouble!

Riki,

Ah! I thought the default was utf8, but it ain't. Found that toward the
bottom of the Custom list.

Now, pdflatex throws errors because {\textdegree} "the control sequence at
the end of your line was never \defed". Please explain the error and how I
fix all my ERT inserts.

Thanks very much,

Rich