Multiple authors

[GerritPlehn]

When trying to set multiple authors with \and according to the documentation, \maketitle times out on overleaf and my local installation does not finish either.

Overleaf provides the following errors:

\endtabular ->\crcr 
                    \egroup \egroup $\egroup 
l.50 \maketitle

I can't figure out why you would want to use a tab mark
or \cr or \span just now. If something like a right brace
up above has ended a previous alignment prematurely,
you're probably due for more error messages, and you
might try typing `S' now just to see what is salvageable.

! Extra }, or forgotten \endgroup.
\endtabular ->\crcr \egroup \egroup 
                                    $\egroup 
l.50 \maketitle

I've deleted a group-closing symbol because it seems to be
spurious, as in `$x}$'. But perhaps the } is legitimate and
you forgot something else, as in `\hbox{$x}'. In such cases
the way to recover is to insert both the forgotten and the
deleted material, e.g., by typing `I$}'.

! Extra }, or forgotten $.
<recently read> \egroup 

l.50 \maketitle

I've deleted a group-closing symbol because it seems to be
spurious, as in `$x}$'. But perhaps the } is legitimate and
you forgot something else, as in `\```

[hochleitner]

Which class/document did you use?

[GerritPlehn]

Which class/document did you use?

\documentclass[internship,german,smartquotes]{hgbthesis} in project I'd like to use it in, but it seems like master and bachelor have the same issue.

I used the HgbThesisTutorial template.

[imagingbook]

The hgbthesis class redefines the maketitle command to create custom title pages and does not support the \and syntax of LaTeX's standard document classes. The assumption is that a thesis always has a single author, thus there is no provision for multiple authors in this case. As a quick remedy you could simply use and instead of \and between authors. However, the classes hgbarticle and hgbreport use the standard maketitle command and also support multiple authors as usual (e.g., see the examples HgbArticle and HgbLabReportEN).

[imagingbook]

As a quick fix, hgbthesis.cls now issues a package warning if trying to define multiple authors inside the \author{..} command. The \and and \thanks{..} commands are suppressed. This at least stops LaTeX from hanging indefinitely ...