Load authorarchive within the AtEndPreamble-hook, required with latest lni.cls.

examples/brucker-authorarchive-2016-lni.tex

@@ -1,16 +1,17 @@
 \documentclass[english]{lni}
 \usepackage[T1]{fontenc}
-\usepackage[LNI,
-   key=brucker-authorarchive-2016,
-   year=2016,
-   publication={Anonymous et al.\ (eds). Proceedings of the International
-       Conference on LaTeX-Hacks. Some Publisher},
-   startpage={42},
-   doi={00/00_00},
-   doiText={0/00\_00},
-   nocopyright
- ]{../authorarchive}
-
+\AtEndPreamble{
+  \usepackage[LNI,
+     key=brucker-authorarchive-2016,
+     year=2016,
+     publication={Anonymous et al.\ (eds). Proceedings of the International
+         Conference on LaTeX-Hacks. Some Publisher},
+     startpage={42},
+     doi={00/00_00},
+     doiText={0/00\_00},
+     nocopyright
+   ]{../authorarchive}
+}
 \usepackage{lipsum}
 
 \title{A Simple Example of the \texttt{authorarchive} Package for \LaTeX}