Split biblio over multiple slides (beamer) with allowframebreaks

Question

I have too many references for a single slide (I am using beamer on Sharelatex) and while looking for a solution I bumped into this:

How can I split a beamer bibliography across two slides?

I tried and follow the suggestions given in the post but allowframebreaks does not work properly. In particular, I can compile and produce a pdf without getting errors, but what I see is a first empty slide (References), and a second (References II) slide overstuffed with my citations.

Can anyone give some help? I am not that expert in using beamer and I need to sort this out asap. Many thanks in advance.

Here is my code and the corresponding output:

 \documentclass[xcolor=svgnames,handout]{beamer}
 \usepackage[utf8] {inputenc}
 \usepackage[T1]  {fontenc}
 \usepackage[english] {babel}
 \usepackage{amsmath,amsfonts,graphicx}
 \usepackage{FabioSimpleStyle}
 \usepackage{verbatim}%comment environment
 \usepackage{graphicx}
 \usepackage{multirow}
 \usepackage{multicol}
 \usepackage{algorithm}
 \usepackage{algpseudocode}
  \usepackage{caption}
  \usepackage{bm}
  \algdef{SE}[DOWHILE]{Do}{DoWhile}{\algorithmicdo}[1]{\algorithmicwhile\ #1}

   \title[Computational intelligence optimisation\hspace{2em}]{An introduction to real world optimisation}
   \author[name]{Fabio}
   \date{Academic year 2015-2016}
  \institute{university}

  \begin{document}
  \maketitle
  \begin{frame}{NFLT}{bla bla bla?}
    \begin{itemize}
      \item \cite{bib:freelunches}.
      \item hyper-heuristics\footnote{for... \cite       {bib:Burke2010,bib:Ozcan2008}} \cite{polilunches}.
    \end{itemize},\cite{bib:Hooke-Jeeves1961}, \cite{bib:Caraffini2012PMS}
  \end{frame}

  \begin{frame}[allowframebreaks]
      \frametitle{References}
      \bibliographystyle{apalike}
     \bibliography{demo}
  \end{frame}
\end{document}