LaTeX.org

Use the command-line or the TeX-Live command-line or powershell to update your TL 2019:

tlmgr update --self

and then

tlmgr update --all

\addcontentsline must be used next to the title of the lists (LOF etc) and not in the preamble. So do not add the entries manually.

If you use a standard class, load package tocbibind to add the TOC, LOF etc to the TOC:

\usepackage{tocbibind}

Package nomencl provides an option for the TOC ...

See also https://tex.stackexchange.com/a/399838

Try something like that in your preamble

\renewcommand{\header}[3]{%
\begin{tikzpicture}[remember picture,overlay]
\node [
fill=fillheader,
anchor=north,
minimum width=\paperwidth, minimum height=3.5cm
] (box) at (current page.north){};
\node [
anchor=south,
font=\fontsize{40pt}{72pt ...

Maybe there is only a missing coma behind citecolor={winered}?

\hypersetup
{
pdfauthor={Dr. Partha},
pdfsubject={Hyperlinks in LaTeX},
pdftitle={myhyper.tex},
pdfkeywords={LaTeX, PDF, hyperlinks}
% colorlinks=false,
pdfborder={0 0 0},
%You can set individual colors for links as below ...

If the part page should be a right hand page:
Best regards
Elke

Use only one titlepage environment for the titlepage and the copyright page and insert \clearpage and \thispagestyle{empty} between them:

\documentclass[10pt,
%english, % removed because of british
british,twoside,openany]{scrbook}
\usepackage{blindtext}
\usepackage[automark,headsepline ...

Your copyright information are on a right hand page and the table of contents starts on a left hand page. Do you want this?
If not: there are additional commands (\extratitle,\uppertitleback, \lowertitleback,...) to format the title pages. Have a look at the KOMA-Script documentation.

Here is a suggestion using tikz

\documentclass{article}
\usepackage{amsmath}

\usepackage{tikz}
\newcommand\mborder[2][]{%
\tikz[anchor=base,baseline]{
\node[inner sep=1pt,#1](h){$\displaystyle#2\mathstrut$};
\draw([xshift=.25em]h.south west)--(h.south west)--(h.north west)
--(h.north east ...

Here is a suggestion to avoid a part of the warnings

%TITR Main Document 5.06in x 7.81in, facing pages
%Preamble
\documentclass[
10pt,
%english,% either english or british
british,% either english or british
twoside,
open=any
]{scrbook}
%\usepackage{scrpage2}
\usepackage[automark,headsepline ...