[Tex/LaTex] \end{enumerate} error

#enumerateerrors

\documentclass[14pt]{extarticle}
\usepackage{lineno}
\linenumbers
\usepackage[utf8]{inputenc} 
\usepackage{lipsum}
\usepackage{enumitem}
\usepackage{enumerate}
\usepackage{sectsty}
\usepackage{titlesec}
\titleformat*{\section}{\Large\bfseries}
\sectionfont{\fontsize{}{15}\selectfont}
\setlist[enumerate]{itemsep=0mm}
\usepackage[danish]{babel}
\begin{document}
\author{TEXT}
\title{TEXT}

\maketitle
    \section*{TEXT}
\begin{enumerate}[{1.}1]
    \item \textbf{TEXT}
    \begin{enumerate}[{1.1.}1]
        \item TEXT
        \item TEXT
        \item TEXT
        \item TEXT
        \begin{itemize}
            \item TEXT
            \item TEXT
            \item TEXT
        \end{itemize}
        \item TEXT
    \end{enumerate}
        \item \textbf{TEXT}
                \begin{enumerate}[{1.2.}1]
                    \item TEXT
                \end{enumerate}
        \item \textbf{TEXT}
                \begin{enumerate}[{1.3.}1]
                    \item TEXT
                \end{enumerate}
\end{enumerate}

Hi I have this text writen but TeXstudio Gives me the following errors:

- Undefined control sequence. \end{enumerate} OR
- Missing number, treated as zero. \end{enumerate} for the lines with the \end{enumerate} code
- Package sectsty Error: The sectsty package doesn't work with(sectsty) this document class. scrartcl, scrbook, and scrreprt.}

Best Answer

You shouldn't mix the use of enumitem and enumerate since their interfaces differ and are conflicting.

Perhaps you're after this type of layout:

enter image description here

\documentclass{extarticle}
\usepackage{enumitem}
\setlist[enumerate]{itemsep=0mm}
\begin{document}

\section{TEXT}

\begin{enumerate}[label=\thesection.\arabic*]
  \item \textbf{TEXT}
  \begin{enumerate}[label*=.\arabic*]
    \item TEXT
    \item TEXT
    \item TEXT
    \item TEXT
    \begin{itemize}
      \item TEXT
      \item TEXT
      \item TEXT
    \end{itemize}
    \item TEXT
  \end{enumerate}
  \item \textbf{TEXT}
  \begin{enumerate}[label*=.\arabic*]
    \item TEXT
  \end{enumerate}
  \item \textbf{TEXT}
  \begin{enumerate}[label*=.\arabic*]
    \item TEXT
  \end{enumerate}
\end{enumerate}

\end{document}

The label* key uses the higher level label as part of its label.

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