Misunderstanding reactions environment of chemmacros v. 5.10

Question

I wanted to give my answer to this question

How to align chemical reactions in multiple environments?

with the environment reactions into the manual of chemmacros. I think always that my low level to understand English language is my Achilles' heel.

My apologies to the author of the package Clemens Niederberger of chemmacros v5.10 2020/02/03 for this question. I have seen your guide to the pag. 43:

But how does the reactions environment operate? I don't understand it. For this MWE I have an error:

! LaTeX3 Error: The key 'chemmacros/reactions/before-tag' is unknown and is (LaTeX3) being ignored. For immediate help type H . ...

l.10 }

?

\documentclass[a4paper,12pt]{article}
\usepackage{amsmath}
\usepackage{chemmacros} %%%%% <---- or chemformula?
\chemsetup[reactions]{
 before-tag =  , %%%%<----automatic number without bold characther
 tag-open = ( ,
 tag-close = )
 }
\begin{document}
\begin{reactions}
 A + 2 B &-> 3 C + D "\label{rxn:test}"
\intertext{Some text in between aligned reactions}
 E + F &<=> G + 1/2 H
\end{reactions}
\end{document}

Answer 1

Addendum: I leave this post to remember my mistake for the next time.

---

After the comment of the very good user @cgnieder, excuse me again with the author of the package. I have not read to the begin of the manual that needed to be loaded \usechemmodule{all} or the specific module \usechemmodule{reactions}. I'm very happy to compile himself the code. Thank you very much @cgnieder.

\documentclass[a4paper,12pt]{article}
\usepackage{amsmath}
\usepackage{chemmacros}
\usechemmodule{reactions}
\chemsetup[reactions]{
 before-tag =  ,
 tag-open = ( ,
 tag-close = )
 }
\begin{document}

\begin{reactions}
 A + 2 B &-> 3 C + D "\label{rxn:test}"
\intertext{After many attempts I was been able to compile it :-)}
 E + F &<=> G + 1/2 H
\end{reactions}
\end{document}