problem with babel

Dear list,
after today upgrading of MikTeX 64-bit I'm faced with strange error when 
I compiling my (old) document with *pdfLaTeX*:

Missing \begin{document}.
B
  abel = {}

and after discontinuing of complication editor open file "luababel.def" 
showing marked Babel = {} (line 186 in file).

In my document I use babel package. It is load as

     \usepackage[T1]{fontenc}
     \usepackage[utf8]{inputenc}
     \usepackage[english,slovene]{babel}%

In documents, where I don't use babel, all work fine. Is this
bug in lua or it is related to MikTeX?

Any help to fix this problem is appreciated.

Zarko



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