Blank LatexPDF File issue with custom Latex Style with SPHINX - pdf

Question

Recently I've created my PDF file correctly as in style formatting.
But now I've got the issue that my RST files from Sphinx are not included.
Maybe that someone knows how I include the RST content into the custom PREAMBLE - sty file content
main.sty
\PassOptionsToPackage{english}{babel}
\usepackage{amsmath}
\usepackage{color,pxfonts,fix-cm}
\usepackage{latexsym}
\usepackage[mathletters]{ucs}
\DeclareUnicodeCharacter{32}{$\ $}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{pict2e}
\usepackage{wasysym}
\usepackage{tikz}
\pagestyle{empty}
\geometry{left=0.2in, top=0.5in, paperwidth=595pt, paperheight=878pt}
\begin{document}
\definecolor{color_93343}{rgb}{0.25098,0.25098,0.25098}
\definecolor{color_217206}{rgb}{0.737255,0.839216,0.443137}
\begin{tikzpicture}[overlay]\path(0pt,0pt);\end{tikzpicture}
\begin{picture}(-5,0)(2.5,0)
\put(-15,-837.4999){\includegraphics[width=596.25pt,height=887.25pt]{latexImage_ab7aceb12f4add82da5ce423202fd278.png}}
\put(55.775,-99.78003){\fontsize{11}{1}\usefont{T1}{cmr}{m}{n}\selectfont\color{color_93343} }
\put(55.525,-810){\fontsize{11}{1}\usefont{T1}{cmr}{m}{n}\selectfont\color{color_93343} }
\put(282.38,-810){\fontsize{11}{1}\usefont{T1}{cmr}{m}{n}\selectfont\color{color_93343} }
\put(509.48,-810){\fontsize{11}{1}\usefont{T1}{cmr}{m}{n}\selectfont\color{color_93343} }
\put(55.775,-823.5){\fontsize{11}{1}\usefont{T1}{cmr}{m}{n}\selectfont\color{color_93343} }
\put(55.775,-118.05){\fontsize{16}{1}\usefont{T1}{cmr}{b}{n}\selectfont\color{color_217206} }
\put(55.775,-150.3){\fontsize{16}{1}\usefont{T1}{cmr}{b}{n}\selectfont\color{color_217206} }
\end{picture}
\end{document}
[SPHINX] Conf.py:
latex_engine = 'pdflatex'
latex_additional_files = [
'latexImage_ab7aceb12f4add82da5ce423202fd278.png',
'main.sty'
]
latex_elements = {
# Additional stuff for the LaTeX preamble.
'extraclassoptions': 'openany',
'preamble' : r"""
\usepackage{main}
\renewcommand{\subtitle}{%s}
""" % (project)
}
It creates the latex PDF with the correct custom styling.. But all the RST content is not included.
I also tried it with 'latex_documents' Creation method within the conf.py but resulted also with a blanko PDF file.