Missing $ inserted.
Check that your $'s match around math expressions. If they do, then you've probably used a symbol in normal text that needs to be in math mode. Symbols such as subscripts ( _ ), integrals ( \int ), Greek letters ( \alpha, \beta, \delta ), and modifiers (\vec{x}, \tilde{x} ) must be written in math mode. See the full list here.If you intended to use mathematics mode, then use $ … $ for 'inline math mode', $$ … $$ for 'display math mode' or alternatively \begin{math} … \end{math}.

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<inserted text>
                $
l.39 	{\large 20^
                 t^h Feb. 2017}
I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.

LaTeX Font Info:    External font `cmex10' loaded for size
(Font)              <12> on input line 39.
LaTeX Font Info:    External font `cmex10' loaded for size
(Font)              <8> on input line 39.
LaTeX Font Info:    External font `cmex10' loaded for size
(Font)              <6> on input line 39.
! Double superscript.
l.39 	{\large 20^t^
                   h Feb. 2017}
I treat `x^1^2' essentially like `x^1{}^2'.
 Himanshu, line 39
Extra }, or forgotten $.
l.39 	{\large 20^t^h Feb. 2017}

I've deleted a group-closing symbol because it seems to be
spurious, as in `$x}$'. But perhaps the } is legitimate and
you forgot something else, as in `\hbox{$x}'. In such cases
the way to recover is to insert both the forgotten and the
deleted material, e.g., by typing `I$}'.
 Himanshu, line 40
Missing $ inserted.
Check that your $'s match around math expressions. If they do, then you've probably used a symbol in normal text that needs to be in math mode. Symbols such as subscripts ( _ ), integrals ( \int ), Greek letters ( \alpha, \beta, \delta ), and modifiers (\vec{x}, \tilde{x} ) must be written in math mode. See the full list here.If you intended to use mathematics mode, then use $ … $ for 'inline math mode', $$ … $$ for 'display math mode' or alternatively \begin{math} … \end{math}.

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<inserted text>
                $
l.40 \end{titlepage}

I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.
 Himanshu, line 40
Missing } inserted.
<inserted text>
                }
l.40 \end{titlepage}

I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
 /usr/local/texlive/2015/texmf-dist/tex/latex/biblatex/biblatex.sty
Package biblatex Warning: No "backend" specified, using Biber backend. To use BibTeX, load biblatex with the "backend=bibtex" option.
 output.aux
Label `my-label' multiply defined.
You have used the same label more than once. Check that each \label{...} labels only one item.

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 Himanshu
Package gensymb Warning: Not defining \perthousand.
 Himanshu
Package gensymb Warning: Not defining \micro.
 Himanshu, line 51
Citation 'latexcompanion' on page 2 undefined on input line 51.
You have cited something which is not included in your bibliography. Make sure that the citation (\cite{...}) has a corresponding key in your bibliography, and that both are spelled the same way.

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 Himanshu
There were undefined references.
You have referenced something which has not yet been labelled. If you have labelled it already, make sure that what is written inside \ref{...} is the same as what is written inside \label{...}.

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 Himanshu
There were multiply-defined labels.
You have used the same label more than once. Check that each \label{...} labels only one item.

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 Himanshu
Package biblatex Warning: Please (re)run Biber on the file: output and rerun LaTeX afterwards.
 Himanshu, line 90
Overfull \hbox (42.56084pt too wide) in paragraph at lines 90--126
 Himanshu, line 194
Overfull \hbox (49.29085pt too wide) in paragraph at lines 194--195