Lualatex / Xelatex problem

After an upgrade of Miktex, Lualatex as well as Xelatex cannot understand \setmathfont
command. 

Undefined control sequence.

l.60 \setmathfont

               [math-style=TeX]{Cambria Math}%    

 

Moreover, the inclusion \usepackage{unicode-math} gives an error as well.

! Undefined control sequence.

\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn 

#3{\mathop {\um_set_big_opera...

l.60 \setmathfont[math-style=TeX]{Cambria Math}%

 

I suppose, the problem is caused by fontspec package.

 

Regards,

Bohdan

 

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