working compiled but with errors

docs/usu_sem2/main.tex

@@ -0,0 +1,176 @@
+\documentclass[12pt,a4paper]{article}
+\usepackage[utf8]{inputenc}
+\usepackage[slovak,shorthands=off]{babel}
+\usepackage[T1]{fontenc}
+\usepackage{indentfirst}
+\usepackage[top=2.5cm, bottom=2cm, left=2cm, right=2cm]{geometry}
+\setlength{\headheight}{13.0721pt}
+\usepackage[unicode]{hyperref}
+\usepackage[medium]{titlesec}
+\usepackage{tikz}
+\usetikzlibrary{positioning}
+
+%bakalarka
+%\usepackage{fontspec}
+%\setmainfont{Times} % Sets the font to Times New Roman
+%\usepackage[a4paper, margin=3.5cm, top=2.5cm, bottom=2.5cm, right=2cm, left=3.5cm]{geometry} % Sets the page margins and size
+\usepackage{setspace} % Provides \setstretch command for line spacing
+\setstretch{1.2} % Sets the line spacing to 1.5
+
+%\usepackage[margin=3.5cm, top=2.5cm, bottom=2.5cm, right=2.5cm, left=3.5cm]{geometry} % Sets the page margins and size
+
+%SECTION FONT SIZE
+%SECTION FONT SIZE
+%SECTION FONT SIZE
+\usepackage{titlesec}
+
+
+
+\usepackage[rightcaption]{sidecap}
+%ked napises \frac, dostanes zlomocek, ked napises \ddfrac
+%tak mas formatovanie pre zlozeny zlomok
+\newcommand\ddfrac[2]{\frac{\displaystyle #1}{\displaystyle #2}}
+\usepackage{multirow}
+\usepackage[table,xcdraw]{xcolor}
+% \usepackage[demo]{graphicx}
+\usepackage{siunitx}
+\usepackage{setspace}
+\usepackage{wrapfig}
+\usepackage{enumerate}
+\usepackage{enumitem}
+\usepackage{calc}
+\usepackage{pdfpages}
+\usepackage{graphicx}
+\usepackage{subfig}
+\usepackage{chngcntr}
+\usepackage{textcomp}
+\usepackage{gensymb}
+\usepackage{float}
+\usepackage{caption}
+\newfloat{graph}{htbp}{grp}
+\floatname{graph}{Graf}
+\newfloat{pic}{htbp}{pic}
+\floatname{pic}{Obrázok}
+\newfloat{tabulka}{htbp}{tbl}
+\floatname{tabulka}{Tabulka}
+\usepackage{caption}
+
+\DeclareCaptionFormat{lstlisting}{Príloha \thelstlisting: #3}
+\captionsetup[lstlisting]{format=lstlisting}
+
+% \counterwithin{graph}{section}
+% \counterwithin{figure}{section}
+% \counterwithin{table}{section}
+% \counterwithin{equation}{section}
+
+%\RequirePackage[backend=bibtex, style=trad-abbrv, citestyle=numeric, sorting=none, natbib=true, doi=false, backref=true, defernumbers=true]{biblatex}
+\usepackage[
+    backend=biber, 
+    natbib=true,
+    style=numeric,
+    sorting=none
+]{biblatex}
+\usepackage{csquotes}
+\bibliography{zdroje.bib}
+% Set the language-specific strings
+\DeclareFieldFormat{labeldate}{\mknumalph{#1}} % Remove parentheses around the year
+
+\DefineBibliographyStrings{slovak}{%
+    andothers = {et al.},
+    and = {a},
+    in = {}
+}
+
+\usepackage{listings}
+\usepackage{csquotes}
+\usepackage{steinmetz}
+\usepackage{amssymb}
+\usepackage{amsmath}
+\usepackage{matlab-prettifier}
+\usepackage{bm}
+\usepackage[italicdiff]{physics}
+\usepackage{array}
+\usepackage{tabu}
+\usepackage{comment}
+\usepackage{setspace}
+
+\usepackage{fancyhdr}
+\usepackage{lmodern}
+\pagestyle{fancy}
+
+\rhead{USU}
+
+%OBRAZKY
+\usepackage{caption}
+\usepackage{tocloft}
+\newcounter{imagecounter}
+\usepackage[table]{xcolor}
+\usepackage{tabularx}
+\usepackage{booktabs}
+
+
+
+
+\usepackage{geometry}
+\usepackage{enumitem}
+
+% Custom checklist
+\newlist{checklist}{itemize}{1}
+\setlist[checklist]{
+  label=$\square$,
+  leftmargin=*,
+  nosep
+}
+
+% Code listing setup
+\usepackage{listings}
+\lstset{
+  basicstyle=\ttfamily\small,
+  breaklines=true,
+  frame=single,
+  framerule=0pt,
+  framesep=3pt,
+  xleftmargin=10pt
+}
+
+
+\begin{document}
+
+%vlozi PDFko s nazvom 1.pdf
+
+\include{titulka}
+\pagenumbering{gobble}
+\pagestyle{empty}
+
+%\includepdf[pages=-]{Priečinský.pdf}\label{pdf:1}
+
+%\newpage
+
+\tableofcontents
+
+\listoffigures
+
+%\newpage
+
+%\listoftables
+
+%vlozi list 1.tex
+
+\newpage
+\pagenumbering{arabic}
+\pagestyle{fancy}
+\setcounter{page}{1}
+
+
+\include{1/4}
+
+
+
+\end{document}
+
+
+VELKOSTI NADPISOV
+section = 16pt CAPITAL
+subsection = 14pt normal
+subsubsection = 12pt normal
+subsubsubsection = 11pt normal