Graphics, Figures & Tables ⇒ Figure does not show in pdf

[Es_dutch]

Hi everyone,
I could not find a solution to my problem on google. Hope one of you can help me. I am new to Latex and use a template I got from a beginners course.

I want to put multiple pictures (PNG format) in my latex document. Though, when I compile it the pictures are not in the pdf. I see a black border and the path of the image inside it. The caption does appear.
You can see it in this picture:

Aantekening 2020-04-24 215030.png (16.93 KiB) Viewed 5226 times

I have the following code in the preamble.

\documentclass[12pt]{report}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{csquotes}
\usepackage{subfiles}
\usepackage{amsmath}
\usepackage{adjustbox}
\usepackage{graphicx}
\usepackage{epstopdf}
\usepackage{ltablex}
\usepackage{booktabs}
\usepackage{tcolorbox}
\usepackage{caption}
\usepackage[font=small,labelfont=bf]{caption}
\usepackage{setspace}
\usepackage{placeins}
\usepackage[hidelinks]{hyperref}
\usepackage{chngpage}
\usepackage{dcolumn}
\usepackage[toc, page]{appendix}
\usepackage{chngcntr}
\usepackage{subcaption}

\usepackage{import}
\renewcommand{\baselinestretch}{1.5}

\usepackage[english]{babel}
\usepackage{apacite}
\usepackage{natbib}
\usepackage[backend=biber, maxcitenames=2, style=apa, sorting=anyt]{biblatex}
\DeclareNameAlias{sortname}{family-given}
\addbibresource{bibliography.bib}
\usepackage[autostyle, english = british]{csquotes}

\usepackage{geometry}
\geometry{margin=2.5cm}

\counterwithout{figure}{chapter}
\counterwithout{table}{chapter}

\usepackage[compact]{titlesec}
\titleformat{\chapter}{\LARGE\bfseries}{\thechapter}{1em}{}
\titlespacing{\chapter}{0pt}{-20pt}{10pt}
\titleformat{\section}{\large\bfseries}{\thesection}{1em}{}
\usepackage{parskip}

\usepackage{fancyhdr}
\fancyhf{}
\pagestyle{fancy}
\fancyfoot[l]{\thepage}
\fancyhead[r]{\nouppercase{\leftmark}}
\renewcommand{\footrulewidth}{0pt}
\renewcommand{\headrulewidth}{0,5pt}
\fancypagestyle{plain}{}

\hyphenation{con-sti-tu-tion-al}


And in the section where I want my figure I have the following code (I have my images in a seperate folder called images):

\begin{figure}
\centering
\begin{subfigure}[b]{0.4\linewidth}
\includegraphics[width=\linewidth]{images/instrumenta.png}
\caption{Instrument a}
\label{fig:instrumenta}
\end{subfigure}

\begin{subfigure}[b]{0.4\linewidth}
\includegraphics[width=\linewidth]{images/instrumentb.png}
\caption{Instrument b}
\label{fig:instrumentb}
\end{subfigure}

\caption{Correlation figures instruments}
\label{fig:corinstruments}

\end{figure}

Hope someone can help me! Thank you in advance.

[Ijon Tichy]

I cannot reproduce the problem with the shown code, because it is not a minimal working example but only some code snippets. However, the mentioned result usually happens with option draft. So maybe somewhere (but not in the shown code) this option is set.

BTW: You should load package only once. Loading them more than once results in option clash errors in your example. And you should never combine natbib or apacite with biblatex. These packages are incompatible and the combination results in error messages. And hyperref should be loaded after most other package, e.g., after titlesec.

I would recommend to reduce the preamble to those package you really need. If if you need more help, you should create and show a minimal working example.

[Es_dutch]

Thank you for your quick answer! Sorry that I did not put it in the right format.
I will check my packages and which i dont need. I copied them from the template so I am not sure which ones are necessary for the lay out and which ones are not.

I checked my packages and also look into the draft tip you gave me. It worked so thank you very much!