Biblatex 命令 \textcite 在 Overleaf 上无法使用统一样式

Question

每次我尝试使用\textcite“统一”样式的命令时，Overleaf 都会报出“未定义控制序列”的错误。但当我切换到“authoryear”样式时，错误就消失了。我该如何解决这个问题？以下是我的序言部分：

\documentclass[12pt]{article}
\usepackage{graphicx}
\usepackage{example-sentences}
\usepackage[backend=biber, style=unified, natbib=true]{biblatex}
\addbibresource{references.bib}
\usepackage [english]{babel}
\usepackage [autostyle, english = american]{csquotes}
\MakeOuterQuote{"}

以下是我从 Overleaf 收到的错误消息：

\blx@biblinkstart [#1]->\blx@sfsave 
                                    \hyper@natlinkstart {\the \c@refsection ...
l.23 ...ime today," from \textcite{rior_gen_2021}}
                                                  .
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
\blx@biblinkstart ...x@sfsave \hyper@natlinkstart 
                                                  {\the \c@refsection @#1}\b...
l.23 ...ime today," from \textcite{rior_gen_2021}}
                                                  .
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

再次，如果我使用 authoryear 样式，则不会发生上述情况（但我想改用统一样式）。请问我该怎么办？

Answer 1

unified的命令的实现\textcite需要您加载hyperref。它使用的代码灵感来自https://tex.stackexchange.com/a/27615/35864.例如参见https://github.com/semprag/biblatex-sp-unified/issues/48。

文档状态

统一引用样式依赖于文内引用和参考书目之间的超链接。因此，该hyperref包是必需的。它会自动加载，sp.cls但如果您使用不同的文档类并且hyperref该类未加载它，您\usepackage{hyperref}也需要将其添加到您的序言中。

添加\usepackage{hyperref}到文档前言中。（请注意，除了少数记录在案的例外情况外，hyperref通常应该是您加载的最后一个包）。以下 MWE 编译得很好

\documentclass[english]{article}
\usepackage[T1]{fontenc}
\usepackage{babel}
\usepackage{csquotes}

\usepackage[backend=biber, style=unified]{biblatex}
\usepackage{hyperref}

\addbibresource{biblatex-examples.bib}

\begin{document}
Lorem \textcite{sigfridsson}

\printbibliography
\end{document}

按原样，但如果省略该行将会引发错误\usepackage{hyperref}。