The class you're using requires more substance before it can properly compile. As such, a simple proposal
environment with some content won't do. My suggestion would be to start with the simple example proposal.tex
provided by the dfgproposal
class.
Here is an extract of the example, stripped down into something small/manageable:
![enter image description here](https://i.stack.imgur.com/OU1KW.png)
\documentclass[RAM]{dfgproposal}
\usepackage[utf8]{inputenc}
\WAperson[id=miko,
personaltitle=Prof. Dr.,
birthdate=13. September 1964,
academictitle=Professor of Computer Science,
affiliation=jacu,
department=case,
privaddress=None of your business,
privtel=that neither,
[email protected],
workaddress={Campus Ring 1, 28757 Bremen},
worktel=+49 421 200 3140,
worktelfax=+49 421 200 3140/493140,
workfax=+49 421 200 493140]
{Michael Kohlhase}
\WAperson[id=gc,
personaltitle=Dr.,
academictitle=Senior Researcher,
birthdate=14. April 1972,
affiliation=pcg,
department=pcsa,
privaddress=None of your business,
privtel=that neither,
workaddress={PCG Way 7, Hooville},
worktel=+49 421 0815 4711,
workfax=+49 421 0815 4712,
[email protected]]
{Great Communicator}
\WAinstitution[id=case,acronym=CASE,shortname=CASE,
url=http://jacobs-university.de/ses/case,
partof=jacu]
{Center for Advanced Systems Engineering}
\WAinstitution[id=jacu,acronym=JacU,
url=http://jacobs-university.de,
streetaddress={Campus Ring 1},
townzip={28759 Bremen},
countryshort=D,
country=Germany,
type=University,
logo=jacobs-logo.png,
shortname=Jacobs University]
{Jacobs University Bremen}
\WAinstitution[id=pcsa,
url=http://pcg.phony/sa,
partof=pcg,shortname=Science Affairs]
{Science Affairs}
\WAinstitution[id=pcg,acronym=PCG,
url=http://pcg.phony,
countryshort=D,
streetaddress={Seefahrtstrasse 5},
townzip={23555 Hamburg},
shortname=Power Consulting]
{Power Consulting GmbH}
\begin{document}
\begin{center}\color{red}\huge
This mock proposal is just an example for \texttt{dfgproposal.cls} it reflects the
current DFG template valid from October 2011.
\end{center}
\urldef{\gcpubs}\url{http://www.pcg.phony/~gc/pubs.html}
\urldef{\mikopubs}\url{http://kwarc.info/kohlhase/publications.html}
\begin{proposal}[PI=miko,
pubspage=mikopubs,
thema=Intelligentes Schreiben von Antr\"agen,
acronym={iPoWr},
acrolong={\underline{I}ntelligent} {\underline{P}r\underline{o}sal} {\underline{Wr}iting},
title=\pn: \protect\pnlong,
totalduration=3 years,
since=1. Feb 2009,
start=1. Feb. 2010,
months=24,
RM=36,RAM=36,
discipline=Computer Science,
areas=Knowledge Management]
\begin{Summary}
Writing grant proposals is a collaborative effort that requires the integration of
contributions from many individuals. The use of an ASCII-based format like LaTeX allows
to coordinate the process via a source code control system like Subversion, allowing the
proposal writing team to concentrate on the contents rather than the mechanics of
wrangling with text fragments and revisions.
\end{Summary}
\section{Additional information \deu{(Ergänzende Erklärungen)}}
Funding proposal XYZ-83282 has been submitted prior to this proposal on related topic XYZ.
\end{proposal}
\end{document}