Documentation fails to compile

[ferdymercury]

I get the following error when including this header-only in one of my projects.

! Undefined control sequence.
<recently read> \unicode 
                         
l.29 $\unicode
              {x212B}^{\ast} \ (m)$

Can you maybe declare the command as suggested here? Thanks!
https://tex.stackexchange.com/questions/353943/how-to-paste-a-mathematica-formula-to-the-latex-unicode-included

[DrGrafil]

\unicode command might be added by one of the extensions I am using. Looking at the latex documentation vs the mathjax html documentation I see that the Angstrom symbol is not rendered. Strangely on my computer it fails silently. It might work if you add TeX/AMSsymbols to mathjax extensions and amssymbols to latex extensions.