Latex listofsymbols newsym with Theta error

I am working with Overleaf on a university assignment, which requires an overview of all mathematical symbols with description and unit. Therefore, I tried using a listofsymbols but when I put a Greek symbol via Theta it’s throwing an error. (I am using pdfLaTeX compiler)
package:

usepackage[final]{listofsymbols} 

document:

opensymdef
newsym[True anomaly $(degree)$]  {trueanomaly}{Theta}
closesymdef

Is giving me a red error

MT@res@a has an extra

and inline there is written

Theta must be in math mode.

But when I surround it with $ it gives even more errors.

Nevertheless, when I use the

§ trueanomaly = 1 $ 

later in my writing, it correctly shows the symbol in my equation. But it does not show the symbol in the listofsymbols.

documentclass{article}
usepackage[final]{listofsymbols}
opensymdef
newsym[True anomaly $({}^circ)$]{trueanomaly}{Theta}
closesymdef
begin{document}
$trueanomaly = 1$
listofsymbols
end{document}

documentclass{article}
usepackage[final]{listofsymbols}
usepackage{etoolbox}

robustifytextdegree

opensymdef
newsym[True anomaly (textdegree)]{trueanomaly}{Theta}
closesymdef

begin{document}

$trueanomaly = 1$
listofsymbols

end{document}