Undefined control sequence.<argument> datecircaprint mkbibdateapalongextra {labelyear}{labelmonth}{la... l.78 end{frame}
Package biblatex Warning: Bibliography string 'retrieved' undefined at entry 'some-3' on input line 78.
Package biblatex Warning: Bibliography string 'from' undefined at entry 'some-3' on input line 78.

usepackage[polish]{babel}
    DeclareLanguageMapping{polish}{polish-apa}

documentclass[10pt, compress, xcolor={usenames, dvipsnames}]{beamer}
usepackage{appendixnumberbeamer}
usepackage[export]{adjustbox}
mode<presentation> {
    usetheme{Warsaw}
    setbeamertemplate{headline}{}
    usepackage[backend=biber,style=apa,citestyle=authoryear, natbib=true]{biblatex}
    DefineBibliographyStrings{english}{andothers={i inni},and={i}} %% Mentioned strings are in polish, not english.

    % According to: https://tex.stackexchange.com/questions/202988/beamer-patching-footnotes-warning-patching-footnotes-failed-footnote-detectio
    % Filter warnings issued by package biblatex starting with "Patching footnotes failed"
    usepackage{silence,lmodern}
    WarningFilter{biblatex}{Patching footnotes failed}
    addbibresource{bibliografia.bib}
    setbeamertemplate{navigation symbols}{}
}
    usepackage{graphicx}
    usepackage{polski}
    uselanguage{polish}
    languagepath{polish}
    usepackage[utf8]{inputenc}
    usepackage{multirow}

%%%%%%%%%%%%%%%%%%%%%%
%   TITLE PAGE definition
logo{%
    includegraphics[scale=0.15]{smiley.pdf}~%
}

title[Short title]{This is a long title displayed only on the title page}
subtitle{Subtitle}

author[short author]{Autor: I am an authorbreak{small co-author: this is coauthor}}

institute[some]
{
    setlengthtabcolsep{0.7pt} % default value: 6pt
    begin{table}[]
    centering
    label{tab:Tabelka}
    begin{tabular}{cl}
    includegraphics[width=0.08linewidth, valign=c]{smiley-orange.pdf} & My University \[.2cm] %scale=0.05,
    multirow{2}{*}{includegraphics[width=0.05linewidth, valign=c]{smiley-green.pdf}} & My Faculty,               \
                          & in two lines                                                    \[.2cm]
    includegraphics[width=0.04linewidth, valign=c]{smiley.pdf}                  & My department %scale=0.1
    end{tabular}
    end{table}
    setlengthtabcolsep{6pt} % default value: 6pt
}

date{15.11.2017}
%%%%%%%%%%%%%%%%%%%%%%


begin{document}

begin{frame}
titlepage
end{frame}

section{Introduction}

%------------------------------------------------
begin{frame}
frametitle{Some information}

Thus I will cite: citep{some-1, some-2}.

I would like to cite citep{some-3} as well.
end{frame}

section*{}
appendix

begin{frame}[t,allowframebreaks]
  frametitle{References}
  {footnotesize printbibliography}
 end{frame}

end{document}

@article{some-3,
    author = "XYW, Cl{'e}ment and T{"u}ger, Andrew",
    hal_id = "hydro-004455129",
    hal_version = "v1",
    journal = "{some Journal}",
    month = dec,
    pages = "1323--1337",
    pdf = "https://no-such-page/test.pdf",
    publisher = "{LaTeX Publications}",
    title = "{From LaTeX to PDF}",
    url = "https://no-such-page/2wtr-003e4329",
    volume = "2",
    year = "2009"
}

@article{some-1,
  title   = "LaTeX in space",
  journal = "TeX Journal ",
  volume  = "17(1)",
  pages   = "113--122",
  year    = "2015",
  doi     = "",
  author  = "Thomas Key"
}

@ARTICLE{some-2,
    author={RtV, Y. and ODW, P. and Tom, J.-P.},
    journal={Proceedings of the TeX},
    title={{The} {LaTeX} {Mission}},
    year={2014},
    volume={980},
    number={5},
    pages={66-67},
    abstract={Long text here},
    keywords={keyword 1; keyword 2; keyword 3},
    doi={10.999999/e434EXW},
    ISSN={0112-5319},
    month={05},
}