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Error: Command crashed: biber.exe

This is my first time using biber in TexStudio and I got this error:

Error: Command crashed: biber.exe ""

I have declared

\usepackage[backend=biber]{biblatex}

Set my default bibliography to biber

What goes wrong?

Update 1:

I manage to run it now by "running my TexStudio" as administrator which is weird as I do not have to run it as administrator for using other packages

However I got the error message:

Entity: line 1957: parser error : expected '>' Bell2005Bell2005

and found these in log

"\x{fffd}" does not map to ascii at C:\Users\X\AppData\Local\Temp\par-4469677561\cache-6bef6bfac2f8155f13b160f6720d3dbe6a10b684\inc\lib/Biber/Utils.pm line 949. "\x{fffd}" does not map to ascii at C:\Users\X\AppData\Local\Temp\par-4469677561\cache-6bef6bfac2f8155f13b160f6720d3dbe6a10b684\inc\lib/Biber/Utils.pm line 949. "\x{fffd}" does not map to ascii at C:\Users\X\AppData\Local\Temp\par-4469677561\cache-6bef6bfac2f8155f13b160f6720d3dbe6a10b684\inc\lib/Biber/Utils.pm line 949. "\x{fffd}" does not map to ascii at C:\Users\Digua\AppData\Local\Temp\par-4469677561\cache-6bef6bfac2f8155f13b160f6720d3dbe6a10b684\inc\lib/Biber/Utils.pm line 949.

WARN - BibTeX subsystem: C:\Users\X\AppData\Local\Temp\Yy0v0remZD\x.bib_35980.utf8, line 1968, warning: possible runaway string started at line 1955 INFO - Overriding locale 'English_United States.1252' default tailoring 'variable = shifted' with 'variable = non-ignorable' INFO - Sorting 'entry' list 'none' keys INFO - No sort tailoring available for locale 'English_United States.1252'

Update 2 after adding the packages

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}

the above problem no longer exist but after the first compilation using pdflatex ( 1. pdflatex->2. bibier->3. pdflatex), I got the warning in log:

'babel/polyglossia' detected but 'csquotes' missing.

Second step (runnning biber) is fine, with the following messages:

Process started: biber.exe "t"
INFO - This is Biber 1.8
INFO - Logfile is 't.blg'
INFO - Reading 't.bcf'
INFO - Using all citekeys in bib section 0
INFO - Processing section 0
INFO - Looking for bibtex format file 'mems.bib' for section 0
INFO - Decoding LaTeX character macros into UTF-8
INFO - Found BibTeX data source 'mems.bib'
INFO - Overriding locale 'English_United States.1252' default tailoring 'variable = shifted' with 'variable = non-ignorable'
INFO - Sorting 'entry' list 'none' keys
INFO - No sort tailoring available for locale 'English_United States.1252'
INFO - Writing 't.bbl' with encoding 'UTF-8'
INFO - Output to t.bbl
Process exited normally

Final compilation gives errors:

Package inputenc Error: Unicode char \u8:� not set up for use with LaTeX
Missing { inserted
Missing } inserted
Undefined control sequence
Undefined control sequence
Undefined control sequence
Undefined control sequence
Missing { inserted
Missing } inserted
Extra }, or forgotten $
Missing } inserted
Undefined control sequence
Package inputenc Error: Unicode char \u8:� not set up for use with LaTeX
'babel/polyglossia' detected but 'csquotes' missing.
Overfull \hbox (3.80615pt too wide) in paragraph
Overfull \hbox (14.87988pt too wide) in paragraph
Overfull \hbox (0.31851pt too wide) in paragraph
Overfull \hbox (4.94199pt too wide) in paragraph
Overfull \hbox (1.34059pt too wide) in paragraph
Overfull \hbox (7.74234pt too wide) in paragraph
Overfull \hbox (0.64954pt too wide) in paragraph
Overfull \hbox (0.59695pt too wide) in paragraph
Overfull \hbox (0.84393pt too wide) in paragraph
Overfull \hbox (6.73877pt too wide) in paragraph
Overfull \hbox (2.74342pt too wide) in paragraph
Overfull \hbox (6.36723pt too wide) in paragraph
Overfull \hbox (3.95943pt too wide) in paragraph
Overfull \hbox (8.18732pt too wide) in paragraph
Overfull \hbox (3.7426pt too wide) in paragraph
Overfull \hbox (11.34412pt too wide) in paragraph
Overfull \hbox (9.60242pt too wide) in paragraph
Overfull \hbox (1.88995pt too wide) in paragraph
Overfull \hbox (3.0841pt too wide) in paragraph
Overfull \hbox (1.00458pt too wide) in paragraph
Overfull \hbox (9.6214pt too wide) in paragraph

All these error point to the line \printbibliography

\documentclass{article}
\usepackage[british]{babel}
\usepackage[]{url}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[backend=biber, style=ieee, urldate=comp]{biblatex}

\renewbibmacro*{bbx:savehash}{}

\addbibresource{mems.bib}

\begin{document}
\nocite{*}

\printbibliography

\end{document}