Since I updated MiKTeX I have been having issues when compiling my references.
It works fine If I only cite one reference e.g. cite{a} but when I want to cite multiple references e.g. cite{a, b, c} I get the following error:

! Undefined control sequence.

<argument> blx@tempb 



l.243 ...cite{Verre2012a, Verre2012b, Verre2011}.



The control sequence at the end of the top line

of your error message was never def'ed. If you have

misspelled it (e.g., `hobx'), type `I' and the correct

spelling (e.g., `Ihbox'). Otherwise just continue,

and I'll forget about whatever was undefined.

I have tried deleting all the generated files -> does not work

I have tried reinstalling MiKTeX, Texmaker -> does not work

I have tried looking for a solution only -> nothing related showed up

Here's is the settings I use

usepackage[utf8]{inputenc} % Required for inputting international characters

usepackage[T1]{fontenc} % Output font encoding for international characters

usepackage{mathpazo} 

usepackage{chemist}    

usepackage{titletoc}   

usepackage{epigraph} 

usepackage{amsmath,amssymb}    

usepackage{pgf}        

usepackage{amsmath}

usepackage{color}

usepackage{graphicx}

 usepackage{booktabs}

 usepackage{multirow}

usepackage{rotating}

usepackage{nameref}

usepackage[section]{placeins}      

usepackage{indentfirst}

usepackage{framed}

usepackage{verbatim}   %begin{comment} end{comment}

usepackage{makeidx}

usepackage[many]{tcolorbox}    

newtcolorbox{mybox}[1]{%

    tikznode boxed title,

    enhanced,

    arc=0mm,

    interior style={white},

    attach boxed title to top center= {yshift=-tcboxedtitleheight/2},

    fonttitle=bfseries,

    colbacktitle=white,coltitle=black,

    boxed title style={size=normal,colframe=white,boxrule=0pt},

    title={#1}}

usepackage[backend=biber ,natbib=true ,style=ieee,defernumbers=false]{biblatex}

addbibresource{Chapters/Chapter_introduction/chap_intro.bib}

include{Chapters/Chapter_introduction/chap_intro}

Here is a snippet of the .bib file

@article{Verre2012a,

author = {Verre, R. and Fleischer, K. and Ualibek, O. and Shvets, I. V.},

journal = {Applied Physics Letters},

number = {3},

title = {{Self-assembled broadband plasmonic nanoparticle arrays for sensing applications}},

volume = {100},

year = {2012}

}



@article{Verre2012b,

author = {Verre, R and Fleischer, K and McGilp, J F and Fox, D and Behan, G and Zhang, H and Shvets, I V},

journal = {Nanotechnology},

number = {3},

pages = {035606},

title = {{Controlled in situ growth of tunable plasmonic self-assembled nanoparticle arrays}},

volume = {23},

year = {2012}

}



@article{Verre2012,

author = {Verre, R. and Fleischer, K. and Ualibek, O. and Shvets, I. V.},

journal = {Applied Physics Letters},

number = {3},

pages = {031102},

title = {{Self-assembled broadband plasmonic nanoparticle arrays for sensing applications}},

volume = {100},

year = {2012}

}

Again it worked fine before the update, which was something like MiKTeX 2.9.6600, and the new one is 2.9.6753. I use Texmaker.

I hope this is enough information.

Thanks in advance

EDIT 1

After looking at the comments I tried the example from here.

It works fine with style=numeric-comp but not with style=ieee.

So you might be able to reproduce the error by trying

documentclass{article}



usepackage{filecontents}



begin{filecontents}{bib.bib}

@article {a,

    title = {A title},

    auhtor = {A. Author},

    year = {2000},

}

@article {b,

    title = {B title},

    auhtor = {B. Author},

    year = {2000},

} 

@article {c,

    title = {C title},

    auhtor = {C. Author},

    year = {2000},

} 

@article {d,

    title = {D title},

    auhtor = {D. Author},

    year = {2000},

} 

end{filecontents}



usepackage[

backend=biber, 

style=ieee

]{biblatex}



addglobalbib{bib.bib}



begin{document}

newrefsection

cite{a, b}

newrefcontext[labelprefix=A.]

printbibliography



newrefsection

cite{c, d}

newrefcontext[labelprefix=B.]

printbibliography

end{document}

EDIT 2

I am not sure if this is the correct place to show a more precise example, but I have been testing and here is a full example which does not compile for me

The files are in the correct folder and what happens is if I comment either includes e.g. %include{Chapters/Chapter_tech_exp/chap_tech_exp}. It works as expected.

If I comment the multiple citations e.g. multiple citations %cite{Harden1959,Wagner2000, Aspnes1988}. in the second file, it works, but not if I comment it only in the first file.

And finally if I remove the style i.e. usepackage[backend=biber, defernumbers=false]{biblatex} It works as well.

I am clueless ...

main.tex

documentclass{article} % The class file specifying the document structure



usepackage[utf8]{inputenc} % Required for inputting international characters

usepackage[T1]{fontenc} % Output font encoding for international characters



usepackage{nameref}

usepackage[backend=biber, style=ieee, defernumbers=false]{biblatex}



defbibheading{subbibliography}{

section*{References for Chapter ref{refsection:therefsection}}}

addbibresource{Bib-main.bib}

usepackage[autostyle=true]{csquotes}





begin{document}



include{Chapters/Chapter_introduction/chap_intro}

include{Chapters/Chapter_tech_exp/chap_tech_exp}



printbibliography

end{document}

chap_tech_exp.tex

section{Reflective and transmission anisotropy spectroscopy (RAS, TAS)}

begin{refsection}

single citation cite{Harden1959}, cite{Wagner2000}.

multiple citations cite{Harden1959,Wagner2000, Aspnes1988}. 

newpage

newrefcontext[labelprefix= romannumeral therefsection]

printbibliography[section=therefsection, heading=subbibnumbered]

end{refsection}

chap_intro.tex

section{First observations of surface plasmon resonance}

begin{refsection}

single citation cite{Harden1959}, cite{Wagner2000}.

multiple citations cite{Harden1959,Wagner2000, Aspnes1988}. 



newrefcontext[labelprefix=romannumeral therefsection]

printbibliography[section=therefsection, heading=subbibnumbered]

end{refsection}

Bib-main.bib

% Encoding: UTF-8

@Article{Aspnes1988,

  author  = {Aspnes, D E and Harbison, J. P. and Studna, A. A. and Florez, L. T.},

  title   = {{Reflectance difference spectroscopy system for real time measurements of crystal growth}},

  journal = {Applied Physics Letters},

  year    = {1988},

  volume  = {52},

  number  = {12},

  pages   = {957--959},

}





@article{Weightman2005,

author = {Weightman, P and Martin, D S and Cole, R J and Farrell, T},

journal = {Reports on Progress in Physics},

number = {6},

pages = {1251--1341},

title = {{Reflection anisotropy spectroscopy}},

volume = {68},

year = {2005}

}





@article{Wagner2000,

author = {Wagner, F E and Haslbeck, S and Stievano, L and Calogero, S and Pankhurst, Q a and Martinek, K P},

journal = {Nature},

number = {6805},

pages = {691--692},

title = {{Before striking gold in gold-ruby glass}},

volume = {407},

year = {2000}

}



@article{Harden1959,

author = {Harden, D. B. and Toynbee, Jocelyn M. C.},

journal = {Archaeologia},

number = {December 1954},

pages = {179--212},

title = {{VII.The Rothschild Lycurgus Cup}},

volume = {97},

year = {1959}

}

Log file when it does NOT work

This is pdfTeX, Version 3.14159265-2.6-1.40.19 (MiKTeX 2.9.6730 64-bit) (preloaded format=pdflatex 2018.7.10)  10 JUL 2018 17:06

entering extended mode

**./test3.tex

(test3.tex

LaTeX2e <2018-04-01> patch level 5

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Document Class: article 2014/09/29 v1.4h Standard LaTeX document class

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File: size10.clo 2014/09/29 v1.4h Standard LaTeX file (size option)

)

c@part=count80

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c@subsubsection=count83

c@paragraph=count84

c@subparagraph=count85

c@figure=count86

c@table=count87

abovecaptionskip=skip41

belowcaptionskip=skip42

bibindent=dimen102

)

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Package: inputenc 2018/04/06 v1.3b Input encoding file

inpenc@prehook=toks14

inpenc@posthook=toks15

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Package: fontenc 2017/04/05 v2.0i Standard LaTeX package



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File: t1enc.def 2017/04/05 v2.0i Standard LaTeX file

LaTeX Font Info:    Redeclaring font encoding T1 on input line 48.

))

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Package: nameref 2016/05/21 v2.44 Cross-referencing by name of section



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Package: refcount 2016/05/16 v3.5 Data extraction from label references (HO)



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Package: gettitlestring 2016/05/16 v1.5 Cleanup title references (HO)



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Package: kvoptions 2016/05/16 v3.12 Key value format for package options (HO)



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Package: keyval 2014/10/28 v1.15 key=value parser (DPC)

KV@toks@=toks16

)

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Package: kvsetkeys 2016/05/16 v1.17 Key value parser (HO)



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Package: ifluatex 2016/05/16 v1.4 Provides the ifluatex switch (HO)

Package ifluatex Info: LuaTeX not detected.

)

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(etexcmds)             That can mean that you are not using pdfTeX 1.50 or

(etexcmds)             that some package has redefined expanded.

(etexcmds)             In the latter case, load this package earlier.

))))

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LaTeX Info: Redefining ref on input line 355.

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etb@tempcnta=count89

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Package: logreq 2010/08/04 v1.0 xml request logger

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(Chapters/Chapter_introduction/chap_intro.tex

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T1/cmr/bx/n/14.4 First ob-ser-va-tions of sur-face plas-mon res-o-nance 

 



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! Undefined control sequence.

<argument> blx@tempb 



l.8 ...s cite{Harden1959,Wagner2000, Aspnes1988}.



The control sequence at the end of the top line

of your error message was never def'ed. If you have

misspelled it (e.g., `hobx'), type `I' and the correct

spelling (e.g., `Ihbox'). Otherwise just continue,

and I'll forget about whatever was undefined.



[2





]



Package biblatex Warning: Option 'labelprefix' requires global

(biblatex)                'defernumbers=true' on input line 11.





Package biblatex Warning: Option 'resetnumbers' requires 'defernumbers=true'.

(biblatex)                Ignoring 'resetnumbers=true' on input line 11.



Package biblatex Info: Reference section=0 on input line 12.

) [3]



Package biblatex Warning: Option 'resetnumbers' requires 'defernumbers=true'.

(biblatex)                Ignoring 'resetnumbers=true' on input line 21.





LaTeX Warning: Empty bibliography on input line 21.



(test3.aux (Chapters/Chapter_introduction/chap_intro.aux)

(Chapters/Chapter_tech_exp/chap_tech_exp.aux))



LaTeX Warning: There were undefined references.





Package biblatex Warning: Please (re)run Biber on the file:

(biblatex)                test3

(biblatex)                and rerun LaTeX afterwards.



Package logreq Info: Writing requests to 'test3.run.xml'.

openout1 = `test3.run.xml'.



 ) 

Here is how much of TeX's memory you used:

 8398 strings out of 492973

 151904 string characters out of 3135926

 572657 words of memory out of 3000000

 12203 multiletter control sequences out of 15000+200000

 8172 words of font info for 20 fonts, out of 3000000 for 9000

 1141 hyphenation exceptions out of 8191

 47i,4n,47p,855b,1219s stack positions out of 5000i,500n,10000p,200000b,50000s

 <C:UserswilliamAppDataLocalMiKTeX2.9fontspkljfourjknappenecdpi60

0ecti1000.pk> <C:UserswilliamAppDataLocalMiKTeX2.9fontspkljfourjknap

penecdpi600ecbx1200.pk> <C:UserswilliamAppDataLocalMiKTeX2.9fontspk

ljfourjknappenecdpi600ecrm1000.pk> <C:UserswilliamAppDataLocalMiKTeX2

.9fontspkljfourjknappenecdpi600ecbx1440.pk>

Output written on test3.pdf (3 pages, 45208 bytes).

PDF statistics:

 149 PDF objects out of 1000 (max. 8388607)

 0 named destinations out of 1000 (max. 500000)

 1 words of extra memory for PDF output out of 10000 (max. 10000000)

This was about a bug in biblatex that has been resolved in version 3.12. Update your TeX system in case you experience this issue.

The answer below is kept for historical interest.

This MWE reproduces the issue

documentclass{article}

usepackage[utf8]{inputenc}

usepackage[T1]{fontenc}

usepackage[backend=biber, style=numeric-comp, sorting=none, defernumbers=true]{biblatex}



addbibresource{biblatex-examples.bib}

usepackage[autostyle=true]{csquotes}



begin{document}

begin{refsection}

single citation cite{sigfridsson}, cite{nussbaum}.

multiple citations cite{sigfridsson,nussbaum, worman}. 

newrefcontext[labelprefix=A]

printbibliography

end{refsection}



begin{refsection}

single citation cite{sigfridsson}, cite{nussbaum}.

multiple citations cite{sigfridsson,nussbaum, worman}. 



newrefcontext[labelprefix=B]

printbibliography

end{refsection}

end{document}

The problem is related to https://github.com/plk/biblatex/issues/697. In fact it is the same issue just with begin{refsection}...end{refsection} instead of newrefsection.

As a workaround until the problem is fixed, use newrefsection instead of begin{refsection}...end{refsection}. This is not entirely equivalent in all cases, but should hopefully work for you.

documentclass{article}

usepackage[utf8]{inputenc}

usepackage[T1]{fontenc}

usepackage[backend=biber, style=numeric-comp, sorting=none, defernumbers=true]{biblatex}



addbibresource{biblatex-examples.bib}

usepackage[autostyle=true]{csquotes}



begin{document}

newrefsection

single citation cite{sigfridsson}, cite{nussbaum}.

multiple citations cite{sigfridsson,nussbaum, worman}. 

newrefcontext[labelprefix=A]

printbibliography



newrefsection

single citation cite{sigfridsson}, cite{nussbaum}.

multiple citations cite{sigfridsson,nussbaum, worman}. 



newrefcontext[labelprefix=B]

printbibliography

end{document}

In the comments you mentioned issues with newrefcontext, you can try a different workaround, my first suggestion would be

makeatletter

protecteddefendrefsection{% 

   endrefcontext

   blx@endrefsection 

   blx@inf@refsec} 

makeatother

Add this to your preamble after you load biblatex.